ORCID Profile
0000-0002-6190-8421
Current Organisation
University of Wollongong
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Mechanical Engineering | Control Systems, Robotics and Automation | Dynamics, Vibration and Vibration Control | Automotive Mechatronics | Manufacturing Engineering Not Elsewhere Classified | Microtechnology | Mechanical Engineering | Electrical and Electronic Engineering | Microelectromechanical Systems (MEMS) | Numerical Modelling and Mechanical Characterisation | Materials Engineering Not Elsewhere Classified | Additive manufacturing | Mechanical engineering | Manufacturing engineering | Automotive Safety Engineering | Hybrid Vehicles and Powertrains | Composite and hybrid materials | Wearable materials | Industrial Biotechnology | Microfluidics and nanofluidics | Manufacturing Processes and Technologies (excl. Textiles) | Engineering/Technology Instrumentation | Materials Engineering | Biomedical Engineering Not Elsewhere Classified | Other Industrial Biotechnology | Automotive Engineering | Structural Engineering | Earthquake Engineering | Civil Engineering | Microelectromechanical systems (MEMS) | Automation and Control Engineering |
ANZSRC Socio-Economic Objective (SEO)
Automotive Equipment | Management of Noise and Vibration from Transport Activities | Transport Equipment not elsewhere classified | Expanding Knowledge in Engineering | Scientific Instruments | Emerging Defence Technologies | Physical sciences | Construction Materials Performance and Processes not elsewhere classified | Mobile Telephone Networks and Services | Appliances and Electrical Machinery and Equipment | Industrial Machinery and Equipment | Mining Machinery and Equipment | Road Freight | Manufactured products not elsewhere classified | Road Safety | Other | Metals (composites, coatings, bonding, etc.) | Medical instrumentation | Scientific instrumentation | Expanding Knowledge in Technology | Construction machinery and equipment | Energy not elsewhere classified | Polymeric materials (e.g. paints) | Diagnostic Methods | Medical Instruments |
Related Links
Publications
Kinematic modeling for artificial flagellum of a robotic bacterium based on electroactive polymer actuators
Publisher: IEEE
Date: 07-2011
Stability enhancement of magnetic levitation ball system with two controlled electomagnets
Publisher: IEEE
Date: 09-2015
The effect of carbide particle additives on rheology of shear thickening fluids
Publisher: Springer Science and Business Media LLC
Date: 05-2016
Electrolytes with reversible switch between liquid and solid phases
Publisher: Elsevier BV
Date: 06-2020
An Adaptive Neuro Fuzzy Hybrid Control Strategy for a Semiactive Suspension with Magneto Rheological Damper
Publisher: SAGE Publications
Date: 2014
DOI: 10.1155/2014/487312
Abstract: The main function of a vehicle suspension system is to isolate the vehicle body from external excitation in order to improve passenger comfort and road holding and to stabilise its movement. This paper considers the implementation of an adaptive neuro fuzzy inference system (ANFIS) with a fuzzy hybrid control technique to control a quarter vehicle suspension system with a semiactive magneto rheological (MR) d er. A quarter car suspension model is set up with an MR d er and a semiactive controller consisting of a fuzzy hybrid skyhook-groundhook controller and an ANFIS model is also designed. The fuzzy hybrid controller is used to generate the desired control force, and the ANFIS is designed to model the inverse dynamics of MR d er in order to obtain a desired current. Finally, numerical simulations of the semiactive suspensions with the ANFIS-hybrid controller, the traditional hybrid controller, and passive suspension are compared. The results of simulations show that the proposed ANFIS-hybrid controller provides better isolation performance than the other controllers.
Design and development of a novel displacement differential self-induced magnetorheological damper
Publisher: SAGE Publications
Date: 08-05-2015
Abstract: This article presents the development of a novel magnetorheological d er which has a self-sensing ability. In this study, a linear variable differential sensor, which was based on the electromagnetic induction mechanism, was integrated with a conventional magnetorheological d er. The working principle, configuration, and prototype of the displacement differential self-induced magnetorheological d er based on the integrated linear variable differential sensor technology were presented. A mathematical model of the proposed displacement differential self-induced magnetorheological d er was established. The finite element model was built with two-dimensional Maxwell software and the magnetic simulations were presented. With this approach, the influence of the flux leakage, the winding cylinder in different basic values of structure parameters, and materials were determined to obtain an optimal displacement differential self-induced magnetorheological d er. Finally, the dynamic performance of the displacement differential self-induced magnetorheological d er was evaluated with a fatigue test machine. The experimental results indicated that the developed displacement differential self-induced magnetorheological d er based on the integrated linear variable differential sensor technology can output controllable d ing force and displacement relative self-induced voltages simultaneously.
Pareto Optimal Information Flow Topology for Control of Connected Autonomous Vehicles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Dean-flow-coupled elasto-inertial particle and cell focusing in symmetric serpentine microchannels
Publisher: Springer Science and Business Media LLC
Date: 21-02-2019
Highly stretchable and sensitive strain sensor based on liquid metal composite for wearable sign language communication device
Publisher: IOP Publishing
Date: 24-09-2021
Recent advances in magnetic digital microfluidic platforms
Publisher: Wiley
Date: 10-07-2021
Abstract: Magnetic Digital microfluidics (DMF), which enables the manipulation of droplets containing different types of s les and reagents by permanent magnets or electromagnet arrays, has been used as a promising platform technology for bioanalytical and preparative assays. This is due to its unique advantages such as simple and “power free” operation, easy assembly, great compatibility with auto control systems, and dual functionality of magnetic particles (actuation and target attachment). Over the past decades, magnetic DMF technique has gained a widespread attention in many fields such as s le‐to‐answer molecular diagnostics, immunoassays, cell assays, on‐demand chemical synthesis, and single‐cell manipulation. In the first part of this review, we summarised features of magnetic DMF. Then, we introduced the actuation mechanisms and fabrication of magnetic DMF. Furthermore, we discussed five main applications of magnetic DMF, namely drug screening, protein assays, polymerase chain reaction (PCR), cell manipulation, and chemical analysis and synthesis. In the last part of the review, current challenges and limitations with magnetic DMF technique were discussed, such as biocompatibility, automation of microdroplet control systems, and microdroplet evaporation, with an eye on towards future development.
Compensation of Geometric Parameter Errors for Terrestrial Laser Scanner by Integrating Intensity Correction
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2020
A smart passive MR damper with a hybrid powering system for impact mitigation: An experimental study
Publisher: SAGE Publications
Date: 24-01-2021
Abstract: This paper presents a smart passive MR d er with fast-responsive characteristics for impact mitigation. The hybrid powering system of the MR d er, composed of batteries and self-powering component, enables the d ing of the MR d er to be negatively proportional to the impact velocity, which is called rate-dependent softening effect. This effect can keep the d ing force as the maximum allowable constant force under different impact speed and thus improve the efficiency of the shock energy mitigation. The structure, prototype and working principle of the new MR d er are presented firstly. Then a vibration platform was used to characterize the dynamic property and the self-powering capability of the new MR d er. The impact mitigation performance of the new MR d er was evaluated using a drop hammer and compared with a passive d er. The comparison results demonstrate that the d ing force generated by the new MR d er can be constant over a large range of impact velocity while the passive d er cannot. The special characteristics of the new MR d er can improve its energy dissipation efficiency over a wide range of impact speed and keep occupants and mechanical structures safe.
Robust control of vehicle suspension with electrohydraulic actuator
Publisher: Inderscience Publishers
Date: 2013
An adaptive tuned vibration absorber based on multilayered MR elastomers
Publisher: IOP Publishing
Date: 16-03-2015
Kinematics-based parameter-varying observer design for sideslip angle estimation
Publisher: IEEE
Date: 07-2015
Experimental characterization of a robotic drug delivery system based on magnetic propulsion
Publisher: IEEE
Date: 07-2011
Liquid metal-based amalgamation-assisted lithography for fabrication of complex channels with diverse structures and configurations
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8LC00047F
Abstract: In this work, we proposed an amalgamation-assisted lithography technique using liquid metal alloys for the fabrication of complex channels with a simple fabrication process, room-temperature fabrication and low toxicity.
Four-Wheel Electric Braking System Configuration With New Braking Torque Distribution Strategy for Improving Energy Recovery Efficiency
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Vibration control of a tunnel boring machine using adaptive magnetorheological damper
Publisher: IOP Publishing
Date: 03-10-2019
Microscopic characteristics of magnetorheological fluids subjected to magnetic fields
Publisher: Elsevier BV
Date: 05-2020
Design and verification of a hybrid nonlinear MRE vibration absorber for controllable broadband performance
Publisher: IOP Publishing
Date: 14-08-2017
Development of a Rotary Damper Integrated with Magnetorheological Bearings toward Extremely High Torque–Volume Ratio
Publisher: MDPI AG
Date: 09-03-2023
Abstract: Magnetorheological (MR) technology has provided effective solutions to many engineering bottleneck problems due to its controllable nature. However, designing a rotary MR d er with a high torque–volume ratio is always challenging, especially for some specific application scenarios with constrained space, such as robot joints. To solve this problem, a rotary d er based on MR bearings was designed and evaluated in this study. In this rotary d er, two MR bearings are utilized to provide controllable d ing torques and serve as rotors, which greatly saves space while providing high torque. This feature grants the characteristics of compact design and high torque–volume ratio. Quasistatic testing shows that the d ing torque of this rotary d er can reach 2.92 Nm when the applied current is 1.2 A. It achieves a high torque–volume ratio of 190 kN/m2, which is nearly four times higher than that of existing rotary MR d ers. The experimental results show that the proposed MR d er is effective in satisfying the high torque requirement in a limited space.
Pharmacologic Activation of the Mitochondrial Phospho <i>enol</i>pyruvate Cycle Enhances Islet Function in Vivo
Publisher: Elsevier BV
Date: 2020
DOI: 10.2139/SSRN.3526274
A 3D paired microelectrode array for accumulation and separation of microparticles
Publisher: IOP Publishing
Date: 28-04-2006
Recent progress of particle migration in viscoelastic fluids
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7LC01076A
Abstract: In this review, we discuss the up-to-date progress of particle migration in viscoelastic fluids mainly from the aspect of applications, laying out a comprehensive perspective on their potential in future lab-on-a-chip platforms.
Magnetorheological technology for fabricating tunable solid electrolyte with enhanced conductivity and mechanical property
Publisher: IOP Publishing
Date: 21-02-2018
Development of a self-sensing magnetorheological damper with magnets in-line coil mechanism
Publisher: Elsevier BV
Date: 03-2017
Modeling and simulation of droplet translocation and fission by electrowetting-on-dielectrics (EWOD)
Publisher: Springer Science and Business Media LLC
Date: 26-08-2010
Programmable digital liquid metal droplets in reconfigurable magnetic fields
Publisher: American Chemical Society (ACS)
Date: 23-07-2020
Rheology of magnetorheological shear thickening fluids
Publisher: Trans Tech Publications Ltd.
Date: 09-02-2008
Liquid metal-filled magnetorheological elastomer with positive piezoconductivity
Publisher: Springer Science and Business Media LLC
Date: 21-03-2019
DOI: 10.1038/S41467-019-09325-4
Abstract: Conductive elastic composites have been used widely in soft electronics and soft robotics. These composites are typically a mixture of conductive fillers within elastomeric substrates. They can sense strain via changes in resistance resulting from separation of the fillers during elongation. Thus, most elastic composites exhibit a negative piezoconductive effect, i.e. the conductivity decreases under tensile strain. This property is undesirable for stretchable conductors since such composites may become less conductive during deformation. Here, we report a liquid metal-filled magnetorheological elastomer comprising a hybrid of fillers of liquid metal microdroplets and metallic magnetic microparticles. The composite’s resistivity reaches a maximum value in the relaxed state and drops drastically under any deformation, indicating that the composite exhibits an unconventional positive piezoconductive effect. We further investigate the magnetic field-responsive thermal properties of the composite and demonstrate several proof-of-concept applications. This composite has prospective applications in sensors, stretchable conductors, and responsive thermal interfaces.
A Compact Variable Stiffness and Damping Shock Absorber for Vehicle Suspension
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2015
An experimental analysis of strontium titanate ceramic substrates polished by magnetorheological finishing with dynamic magnetic fields formed by rotating magnetic poles
Publisher: IOP Publishing
Date: 13-04-2017
Investigation of bimodal particles based magnetorheological elastomers
Publisher: Trans Tech Publications Ltd.
Date: 09-02-2008
A Liquid-Metal-Based Magnetoactive Slurry for Stimuli-Responsive Mechanically Adaptive Electrodes
Publisher: Wiley
Date: 17-07-2018
Abstract: Electrical communication between a biological system and outside equipment allows one to monitor and influence the state of the tissue and nervous networks. As the bridge, bioelectrodes should possess both electrical conductivity and adaptive mechanical properties matching the target soft biosystem, but this is still a big challenge. A family of liquid-metal-based magnetoactive slurries (LMMSs) formed by dispersing magnetic iron particles in a Ga-based liquid metal (LM) matrix is reported here. The mechanical properties, viscosity, and stiffness of such materials rapidly respond to the stimulus of an applied magnetic field. By varying the intensity of the magnetic field, regulation within a factor of 1000 of the Young's modulus from ≈kPa to ≈MPa, and the ability to reach GPa with more dense iron particles inside the LMMS are demonstrated. With the advantage of high conductivity of the LM matrix, the functions of the LMMS are not only limited to the soft implanted electrodes or penetrating electrodes in biosystems: the electrical response based on the LMMS electrodes can also be precisely tuned by simply regulating the applied magnetic field.
Design and performance evaluation of a novel magnetorheological valve with a tunable resistance gap
Publisher: IOP Publishing
Date: 11-11-2014
2D magnetic field sensing array using face-shear mode PMN-PT/Metglas composite
Publisher: IOP Publishing
Date: 18-08-2020
Liquid metal droplet robot
Publisher: Elsevier BV
Date: 06-2020
Guest Editorial Focused Section on Mechatronics in Cyber-Physical Systems
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2018
Control of a multiple-DOF vehicle seat suspension with roll and vertical vibration
Publisher: Elsevier BV
Date: 11-2018
Development of an MR-brake-based haptic device
Publisher: IOP Publishing
Date: 13-11-2006
Flow rate-insensitive microparticle separation and filtration using a microchannel with arc-shaped groove arrays
Publisher: Springer Science and Business Media LLC
Date: 03-2017
Sheathless Separation of Cyanobacterial Anabaena by Shape Using Viscoelastic Microfluidics
Publisher: American Chemical Society (ACS)
Date: 09-08-2021
Nonlinear rheological behavior of magnetorheological fluids: step-strain experiments
Publisher: IOP Publishing
Date: 04-2002
Magnetorheological elastomer base isolation in civil engineering: A review
Publisher: Elsevier BV
Date: 06-2023
High-Throughput, Off-Chip Microdroplet Generator Enabled by a Spinning Conical Frustum
Publisher: American Chemical Society (ACS)
Date: 12-02-2019
DOI: 10.1021/ACS.ANALCHEM.9B00093
Abstract: Although droplet-based microfluidics has been broadly used as a versatile tool in biology, chemistry, and nanotechnology, its rather complicated microfabrication process and the requirement of specialized hardware and operating skills hinder researchers fully unleashing the potential of this powerful platform. Here, we develop an integrated microdroplet generator enabled by a spinning conical frustum for the versatile production of near-monodisperse microdroplets in a high-throughput and off-chip manner. The construction and operation of this generator are simple and straightforward without the need of microfabrication, and we demonstrate that the generator is able to passively and actively control the size of the produced microdroplets. In addition to water microdroplets, this generator can produce microdroplets of liquid metal that would be difficult to produce in conventional microfluidic platforms as liquid metal has high surface tension. Moreover, we demonstrate that this generator can produce solid hydrogel microparticles and fibers using integrated ultraviolet (UV) light. In the end, we further explore the ability of this generator for forming double emulsions by coflowing two immiscible liquids. Given the remarkable abilities demonstrated by this platform and the tremendous potential of microdroplets, this user-friendly method may revolutionize the future of droplet-based chemical synthesis and biological analysis.
The rheology of shear thickening fluid (STF) and the dynamic performance of anSTF-filled damper
Publisher: IOP Publishing
Date: 29-04-2008
Experimental investigation into biomechanical and biotribological properties of a real intestine and their significance for design of a spiral-type robotic capsule
Publisher: SAGE Publications
Date: 11-02-2014
Abstract: This article reports on the results and implications of our experimental investigation into the biomechanical and biotribological properties of a real intestine for the optimal design of a spiral-type robotic capsule. Dynamic shear experiments were conducted to evaluate how the storage and loss moduli and d ing factor of the small intestine change with the speed or the angular frequency. The sliding friction between differently shaped test pieces, with a topology similar to that of the spirals, and the intestine s le was experimentally determined. Our findings demonstrate that the intestine’s biomechanical and biotribological properties are coupled, suggesting that the sliding friction is strongly related to the internal friction of the intestinal tissue. The significant implication of this finding is that one can predict the reaction force between the capsule with a spiral-type traction topology and the intestine directly from the intestine’s biomechanical measurements rather than employing complicated three-dimensional finite element analysis or an inaccurate analytical model. Sliding friction experiments were also conducted with bar-shaped solid s les to determine the sliding friction between the s les and the small intestine. This sliding friction data will be useful in determining spiral material for an optimally designed robotic capsule.
Investigation of a magnetorheological elastomer metamaterial sandwich beam with tunable graded stiffness for broadband vibration attenuation
Publisher: IOP Publishing
Date: 23-05-2023
Abstract: Metamaterials with local resonance show promising application prospects in low-frequency vibration attenuation. However, with the drawback of narrow band gap, such potential is greatly limited. In order to broaden the local resonant band gap, a semi-active graded magnetorheological elastomer (MRE) metamaterial sandwich beam (GMREMSB) with real-time tunable graded stiffness was proposed and investigated in this study. For theoretical calculation, a mass-spring model was established for the GMREMSB. Then the calculated band gap and transmissibility using Timoshenko beam theory and spectral element method were compared. An experimental test was also conducted for verification. The results show that the bandwidth of the proposed GMREMSB can be widened by the graded stiffness arranged in ascending order. The experimental band gap of the GMREMSB under the graded current of 0.0–0.5–1.0 A is 6.4 Hz wider than the band gap of the periodic structure with the single current of 0.0 A and is 5.0 Hz wider than that of 1.0 A. The growth rate reaches 15.06% and 11.39%, respectively.
Robust Adaptive Sliding Mode PI Control for Active Vehicle Seat Suspension Systems
Publisher: IEEE
Date: 06-2019
Kinematic analysis of electroactive polymer actuators as soft and smart structures with more DoF than inputs
Publisher: IEEE
Date: 07-2012
MR damper and its application for semi-active control of vehicle suspension system
Publisher: Elsevier BV
Date: 09-2002
Analysis and fabrication of patterned magnetorheological elastomers
Publisher: IOP Publishing
Date: 20-05-2008
Viscoelastic properties of MR fluids under oscillatory shear
Publisher: SPIE
Date: 02-07-2001
DOI: 10.1117/12.432732
Investigation on magnetorheological elastomers based on natural rubber
Publisher: Springer Science and Business Media LLC
Date: 03-04-2007
Dynamically integrated spatiotemporal-based trajectory planning and control for autonomous vehicles
Publisher: Institution of Engineering and Technology (IET)
Date: 27-09-2018
Driver intention based coordinate control of regenerative and plugging braking for electric vehicles with in-wheel PMSMs
Publisher: Institution of Engineering and Technology (IET)
Date: 28-09-2018
The development of an adaptive tuned magnetorheological elastomer absorber working in squeeze mode
Publisher: IOP Publishing
Date: 30-05-2014
Side-slip angle estimation and stability control for a vehicle with a non-linear tyre model and a varying speed
Publisher: SAGE Publications
Date: 31-10-2015
Abstract: In this paper, the novel design of a side-slip angle observer and an observer-based stability controller for a vehicle with a non-linear tyre model and a varying forward speed is presented. The Takagi–Sugeno fuzzy modelling technique is first applied to represent the vehicle’s lateral dynamics with the non-linear Dugoff tyre model and varying speed. The observer and the observer-based controller are then constructed using the measured yaw rate and the estimated premise and state variables and are designed to be robust against the model and parameter uncertainties. The conditions for designing such an observer and an observer-based controller are derived in terms of linear matrix inequalities. Numerical simulations on a non-linear eight-degree-of-freedom vehicle dynamics model and experimental data are conducted to validate the effectiveness of the proposed approach. The comparison of results with those from other existing approaches shows that the designed observer can accurately estimate the vehicle’s side-slip angle and the controller can effectively control this side-slip angle regardless of the variation in the vehicle’s longitudinal velocity.
Fundamentals and applications of inertial microfluidics: a review
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5LC01159K
Abstract: We provide a comprehensive review describing the fundamental mechanisms of inertial microfluidics, structure design and applications in biology, medicine and industry.
Equipping New SMA Artificial Muscles With Controllable MRF Exoskeletons for Robotic Manipulators and Grippers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
State of the art of control schemes for smart systems featuring magneto-rheological materials
Publisher: IOP Publishing
Date: 14-03-2016
Effect of carbon black on the mechanical performances of magnetorheological elastomers
Publisher: Elsevier BV
Date: 05-2008
A modified extreme seeking-based adaptive fuzzy sliding mode control scheme for vehicle anti-lock braking
Publisher: Inderscience Publishers
Date: 2020
Corrigendum: Fabrication and characterization of a magnetic micro-actuator based on deformable Fe-doped PDMS artificial cilium using 3D printing (2015 Smart Mater. Struct. 24 035015)
Publisher: IOP Publishing
Date: 20-05-2015
A magnetorheological fluid based planetary gear transmission for mechanical power-flow control
Publisher: IOP Publishing
Date: 04-03-2021
Abstract: Power transmission for mechanical systems often involves the use of clutching- or dissipative-elements to protect drive systems and provide steady output power. As standard implementations in motor-driven systems, these devices operate passively or in discrete states, providing limited controllability to the power output. This paper presents a magnetorheological-fluid-based differential (planetary) gear transmission which serves to variably couple motor power through a sun gear input to a load affixed to a planet carrier output. This is achieved both rapidly and continuously through controlled slippage between the ring gear of the device and its casing. Compared to conventional MR clutches, the unique functionality of the differential gearbox enables use of an MR brake with lower inertia than an in-line clutch. Through control of current supplied to the energizing electromagnet of brake component of the transmission, simple and reversible governing of output torque and speed is achieved. This behaviour is modelled and verified through testing, showing a 349% variation in brake torque for constant speed tests from the off state to the maximum capacity of the device, with a 262% variation in brake torque under a harmonic input displacement also observed. The versatility of the device demonstrated through PID speed and torque control.
A Novel Multifeature Based On-Site Calibration Method for LiDAR-IMU System
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Making a hydrophoretic focuser tunable using a diaphragm
Publisher: AIP Publishing
Date: 11-2014
DOI: 10.1063/1.4903761
Abstract: Microfluidic diagnostic devices often require handling particles or cells with different sizes. In this investigation, a tunable hydrophoretic device was developed which consists of a polydimethylsiloxane (PDMS) slab with hydrophoretic channel, a PDMS diaphragm with pressure channel, and a glass slide. The height of the hydrophoretic channel can be tuned simply and reliably by deforming the elastomeric diaphragm with pressure applied on the pressure channel. This operation allows the device to have a large operating range where different particles and complex biological s les can be processed. The focusing performance of this device was tested using blood cells that varied in shape and size. The hydrophoretic channel had a large cross section which enabled a throughput capability for cell focusing of ∼15 000 cells s−1, which was more than the conventional hydrophoretic focusing and dielectrophoresis (DEP)-active hydrophoretic methods. This tunable hydrophoretic focuser can potentially be integrated into advanced lab-on-a-chip bioanalysis devices.
An Electromagnetic Variable Stiffness Device for Semiactive Seat Suspension Vibration Control
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
Experimental testing and modelling of a rotary variable stiffness and damping shock absorber using magnetorheological technology
Publisher: SAGE Publications
Date: 14-03-1970
Abstract: This article presents a novel rotary shock absorber which combines the abilities of variable stiffness and variable d ing by assembling a set of two magnetorheological d ing units, one of which being placed in series with a rubber spring. This allows the d ing and stiffness to be controlled independently by the internal d ing and the external d ing units, respectively. A test bench was established to verify the variable stiffness and d ing functionality. The experimental results for variable d ing test, variable stiffness test and co-working test are presented. At the litude of 10° and the frequency 0.5 Hz, increases of 141.6% and 618.1% are obtained for d ing and stiffness separately if the corresponding current increased from 0 to 1 A and from 0 to 2 A, respectively. A mathematical model is then developed and verified to predict the changing of the d ing and stiffness. The test results and the simulated model confirm the feasibility of the shock absorber with the ability of varying d ing and stiffness simultaneously.
Design, Fabrication, and Test of a Coupled Parametric–Transverse Nonlinearly Broadband Energy Harvester
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2018
A new magnetorheological quasi-zero stiffness vibration isolation system with large zero stiffness range and highly stable characteristics
Publisher: Springer Science and Business Media LLC
Date: 06-09-2023
Active droplet sorting in microfluidics: a review
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6LC01435F
Abstract: This review presents the fundamentals of different active methods for sorting droplets in microfluidics.
Experimental Nonlinear Model Identification of a Highly Nonlinear Resonator
Publisher: ASME International
Date: 09-02-2018
DOI: 10.1115/1.4039030
Abstract: In this work, two model identification methods are used to estimate the nonlinear large deformation behavior of a nonlinear resonator in the time and frequency domains. A doubly cl ed beam with a slender geometry carrying a central intraspan mass when subject to a transverse excitation is used as the highly nonlinear resonator. A nonlinear Duffing equation has been used to represent the system for which the main source of nonlinearity arises from large midplane stretching. The first model identification technique uses the free vibration of the system and the Hilbert transform (HT) to identify a nonlinear force–displacement relationship in the large deformation region. The second method uses the frequency response of the system at various base accelerations to relate the maximum resonance frequency to the nonlinear parameter arising from the centerline extensibility. Experiments were conducted using the doubly cl ed slender beam and an electrodynamic shaker to identify the model parameters of the system using both of the identification techniques. It was found that both methods produced near identical model parameters an excellent agreement between theory and experiments was obtained using either of the identification techniques. This follows that two different model identification techniques in the time and frequency domains can be employed to accurately predict the nonlinear response of a highly nonlinear resonator.
Haptic interfacing system using magnetorheological fluids
Publisher: SPIE
Date: 11-2002
DOI: 10.1117/12.469066
A novel empirical heat transfer model for a solar thermal storage process using phase change materials
Publisher: Elsevier BV
Date: 02-2019
Three-Dimensional Kinematic Modeling of Helix-Forming Lamina-Emergent Soft Smart Actuators Based on Electroactive Polymers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2016
MRE Properties under Shear and Squeeze Modes and Applications
Publisher: SAGE Publications
Date: 09-12-2009
Abstract: Magnetorheological elastomers (MREs) are smart materials whose mechanical properties, like their modulus and elasticity, can be controlled by an external magnetic field. This feature has resulted in a number of novel applications, such as adaptive tuned dynamic vibration absorbers for suppressing unwanted vibrations over a wide frequency range. MRE-based devices operate in different modes, such as shear mode and squeeze mode however, the study of mechanical performances of MREs under squeeze mode is very rare. This article aims to investigate MRE performances under both shear and squeeze modes. Experimental studies and simulations were conducted to analyze the MR effect in both modes. These studies indicate a different working frequency ranges for both modes. In a case study, a MRE-based vibration absorber was built up in a simulation and its mechanical performances were analyzed, which demonstrated good capabilities in reducing vibrations.
Development of a force sensor working with MR elastomers
Publisher: IEEE
Date: 07-2009
Liquid Metal Hybrid Composites with High-Sensitivity and Large Dynamic Range Enabled by Micro- and Macrostructure Engineering
Publisher: American Chemical Society (ACS)
Date: 17-09-2021
Improving Positioning Accuracy of the Mobile Laser Scanning in GPS-Denied Environments: An Experimental Case Study
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 15-11-2019
Recent progress of magnetorheological elastomers: a review
Publisher: IOP Publishing
Date: 12-11-2020
Magnetic propulsion of a spiral-type endoscopic microrobot in a real small intestine
Publisher: IEEE
Date: 07-2012
Study of shear-stiffened elastomers
Publisher: IOP Publishing
Date: 31-10-2012
Fabrication and characterisation of patterned magnetorheological elastomers
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4811884
Phase Separation in Liquid Metal Nanoparticles
Publisher: Elsevier BV
Date: 07-2019
Design and Implementation of a Soft Robotic Arm Driven by SMA Coils
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2009
Experimental nonlinear dynamics of a geometrically imperfect magneto-rheological elastomer sandwich beam
Publisher: Elsevier BV
Date: 03-2016
Design and development of a parametrically excited nonlinear energy harvester
Publisher: Elsevier BV
Date: 10-2016
Hierarchical based model predictive control for automatic vehicles brake
Publisher: IEEE
Date: 02-2017
Design and Analysis of a Novel Magnetorheological Fluid Dual Clutch for Electric Vehicle Transmission
Publisher: SAE International
Date: 18-02-2019
DOI: 10.4271/2019-01-5014
A 2-DOF MR actuator joystick for virtual reality applications
Publisher: Elsevier BV
Date: 07-2007
Study on creep characteristics of oil film bearing Babbitt
Publisher: Informa UK Limited
Date: 05-2014
Robust yaw moment control for vehicle handling and stability
Publisher: Inderscience Publishers
Date: 2009
Semi-Active Chatter Reduction for Robotic Machining Using Magnetorheological Elastomers (MREs)
Publisher: IEEE
Date: 07-2017
The variable resonance magnetorheological pendulum tuned mass damper: Mathematical modelling and seismic experimental studies
Publisher: SAGE Publications
Date: 28-11-2019
Abstract: Tuned mass d er technologies are progressively advancing through innovative application of smart materials, facilitating more versatile infrastructure protection. During seismic events, primarily encountered surrounding fault lines, high-rise buildings and other civil structures can suffer catastrophic failures if not adequately protected. Where traditional passive structural protection may mitigate such damage, adaptive systems which provide controllable vibration attenuation across a wide range of excitation frequencies have seen growth in use, overcoming the challenges resulting from unpredictable seismic spectrums. As a robust solution to this problem, this article presents and analyses a variable resonance magnetorheological-fluid-based pendulum tuned mass d er which employs a rotary magnetorheological d er in a controllable differential transmission to add stiffness to a swinging pendulum mass. The device is mathematically modelled based on magnetic field analysis, the Bingham plastic shear-stress model for magnetorheological fluids, and planetary gearbox kinematic and torque relationships, with the model then being validated against experimental data. The passive and semi-active-controlled performance of the device in seismic vibration suppression is then experimentally investigated using a scale five-storey building. In tests conducted with the 1985 Mexico City record, the semi-active device outperformed the (optimal) passive-on tuning, at best reducing peak displacement by 15.47% and acceleration by 28.28%, with similar improvement seen against the passive-off case for the 1940 El Centro record.
A Controllable Untethered Vehicle Driven by Electrically Actuated Liquid Metal Droplets
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2019
Advanced vehicle suspension with variable stiffness and damping MR damper
Publisher: IEEE
Date: 02-2017
Design a Novel Target to Improve Positioning Accuracy of Autonomous Vehicular Navigation System in GPS Denied Environments
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2021
A novel magneto-rheological fluid dual-clutch design for two-speed transmission of electric vehicles
Publisher: IOP Publishing
Date: 17-06-2021
A highly adjustable magnetorheological elastomer base isolator for applications of real-time adaptive control
Publisher: IOP Publishing
Date: 29-08-2013
Design and Fabrication of Magnetically Functionalized Core/Shell Microspheres for Smart Drug Delivery
Publisher: Wiley
Date: 08-01-2009
Development of a magnetorheological elastomer rubber joint with fail-safe characteristics for high-speed trains
Publisher: IOP Publishing
Date: 10-02-2022
Abstract: The stiffness of the train’s rubber joint at the primary suspension system has a crucial influence on the operation stability and curve-passing performance. As traditional rubber joint only provides unadjustable parameters, they cannot meet the conflicting stiffness requirements when the train is running at high speed on straight track and passing through the curve track. To solve this problem, this paper proposed a new rubber joint with fail-safe characteristics based on magnetorheological elastomer (MRE). The joint stiffness is controlled by a hybrid magnetic field generated by permanent magnets and electromagnets. With this hybrid magnetic field, the initial stiffness of the MRE joint can be designed to be hard so as to suppress the hunting motions and vibrations of wheelsets and thus keep the trains’ high-speed stability furthermore, the stiffness can decrease by energizing the electromagnets when passing through a curve track. With this characteristic, the joint can guarantee the safety of the train at high operation speed even when the joint control system fails. The prototype of the MRE joint was fabricated and assembled. Stiffness controllability of the MRE joint was tested using an MTS machine. The result reveals that the stiffness of this MRE joint can be controlled effectively. According to the testing results, a new phenomenological model was built to predict the joint’s dynamic performance. Then this established model was integrated into dynamic models of trains to numerically evaluate the new joint’s influence on the train’s stability and trafficability. The evaluation result shows that the proposed MRE joint is fully effective on providing controllable stiffness to satisfy the conflicting stiffness requirement with fail-safe characteristics.
Optimal Distribution Control Of Non-Linear Tire Force Of Electric Vehicles With In-Wheel Motors
Publisher: Wiley
Date: 06-05-2016
DOI: 10.1002/ASJC.1145
Thixotropy of MR shear-thickening fluids
Publisher: IOP Publishing
Date: 11-11-2010
Vibration reduction of seat suspension using observer based terminal sliding mode control with acceleration data fusion
Publisher: Elsevier BV
Date: 06-2017
Experimental and modeling study of viscoelastic behaviors of magneto-rheological shear thickening fluids
Publisher: Springer Science and Business Media LLC
Date: 05-2014
A rotary variable admittance device and its application in vehicle seat suspension vibration control
Publisher: Elsevier BV
Date: 09-2019
Disturbance observer based Takagi-Sugeno fuzzy control for an active seat suspension
Publisher: Elsevier BV
Date: 09-2017
A variable inertance and variable damping vibration control system with electric circuit
Publisher: IEEE
Date: 06-2019
Analysis of Magnetic Interaction in Remotely Controlled Magnetic Devices and its Application to a Capsule Robot for Drug Delivery
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2018
Focusing of sub-micrometer particles in microfluidic devices
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9LC00785G
Abstract: This work comprehensively reviews the fundamentals and applications of different types of microfluidic techniques for the focusing of sub-micrometer particles.
Performance evaluation and comparison of magnetorheological elastomer absorbers working in shear and squeeze modes
Publisher: SAGE Publications
Date: 21-01-2015
Abstract: The adaptive tuned vibration absorbers based on magnetorheological elastomers are mainly developed in shear and squeeze working modes. The distinctions between the two kinds of magnetorheological elastomer absorbers are less investigated. In order to investigate the distinctions induced by the working mode, two magnetorheological elastomer absorbers working in different modes are theoretically and experimentally analyzed in this article. Magnetorheological elastomer was first prepared and tested in shear and squeeze modes by parallel-plate rheometer and materials test system, respectively. Then, the fabricated magnetorheological elastomers were used to develop absorbers working in shear and squeeze modes. The performance of these two absorbers at various magnetic fields is characterized under swept excited frequencies by using a vibration testing system. The experimental results illustrate that the natural frequency of the magnetorheological elastomer absorber working in shear mode can be tuned from 32 to 62 Hz, while the variation range of the natural frequency of the magnetorheological elastomer absorber working in squeeze mode is from 62 to 127 Hz, which indicates the squeeze magnetorheological elastomer absorber has larger frequency-shift range than the shear magnetorheological elastomer absorber. Then, two theoretical models are presented to investigate and predict the frequency-shift performance of the two magnetorheological elastomer absorbers. The theoretical analysis results further verify the above conclusion.
Inertial particle separation by differential equilibrium positions in a symmetrical serpentine micro-channel
Publisher: Springer Science and Business Media LLC
Date: 31-03-2014
DOI: 10.1038/SREP04527
Sonication-enabled rapid production of stable liquid metal nanoparticles grafted with poly(1-octadecene-alt-maleic anhydride) in aqueous solutions
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NR05600E
Abstract: We demonstrate sonication-enabled production of liquid metal nanoparticles grafted with poly(1-octadecene- alt -maleic anhydride) in water that remain stable in biological buffers.
High-throughput sheathless and three-dimensional microparticle focusing using a microchannel with arc-shaped groove arrays
Publisher: Springer Science and Business Media LLC
Date: 23-01-2017
DOI: 10.1038/SREP41153
Abstract: Sheathless particle focusing which utilises the secondary flow with a high throughput has great potential for use in microfluidic applications. In this work, an innovative particle focusing method was proposed. This method makes use of a mechanism that takes advantage of secondary flow and inertial migration. The device was a straight channel with arrays of arc-shaped grooves on the top surface. First, the mechanism and expected focusing phenomenon are explained using numerical simulation of the flow field and force balance. A simulation of particle trajectories was conducted as a reference, and then a series of experiments was designed and the effects of changes in particle size, flow rate and quantity of the groove structure were discussed. The microscopic images show that this particle focusing method performed well for different size particles, and the results agreed well with the theory and simulated results. Finally, the channel successfully concentrated Jurkat cells, which showed a good compatibility in the biological assay field. In this work, the arc-shaped groove channel was demonstrated to have the ability to achieve high-throughput, sheathless and three-dimensional particle focusing with simple operations.
Investigation of particle lateral migration in sample‐sheath flow of viscoelastic fluid and Newtonian fluid
Publisher: Wiley
Date: 06-2016
Abstract: In this work, particle lateral migration in s le-sheath flow of viscoelastic fluid and Newtonian fluid was experimentally investigated. The 4.8-μm micro-particles were dispersed in a polyethylene oxide (PEO) viscoelastic solution, and then the solution was injected into a straight rectangular channel with a deionised (DI) water Newtonian sheath flow. Micro-particles suspended in PEO solution migrated laterally to a DI water stream, but migration in the opposite direction from a DI water stream to a PEO solution stream or from one DI water stream to another DI water stream could not be achieved. The lateral migration of particles depends on the viscoelastic properties of the s le fluids. Furthermore, the effects of channel length, flow rate, and PEO concentration were studied. By using viscoelastic s le flow and Newtonian sheath flow, a selective particle lateral migration can be achieved in a simple straight channel, without any external force fields. This particle lateral migration technique could be potentially used in solution exchange fields such as automated cell staining and washing in microfluidic platforms, and holds numerous biomedical applications.
An effective methodology to solve inverse kinematics of electroactive polymer actuators modelled as active and soft robotic structures
Publisher: Elsevier BV
Date: 09-2013
A reconfigurable and automatic platform for the on-demand production of stretchable conductive composites
Publisher: IOP Publishing
Date: 20-03-2023
Abstract: Stretchable conductive composites (SCCs) have been widely used as interconnects and sensors in stretchable electronic devices due to their tunable electromechanical properties and intrinsically high stretchability compared to solid metals. SCCs can be readily made by mixing (or breaking bulk) conductive fillers within an elastomeric polymer, which are subsequently cured. Despite the simplicity of this, most fabrication methods follow customized protocols and lack precise automatic control. These methods also require bulky and costly equipment (e.g. stirrers, mixers, ovens, and vacuuming machines). Also, variations in the production process make it challenging to maintain the consistency of SCC’s electrical and mechanical properties produced in different batches. To solve this problem, this work develops an automatic SCC production platform (ASPP) that can be programmed to produce SCCs with high consistency in properties. The versatility of ASPP is demonstrated by fabricating SCCs with single and hybrid fillers, and porous structures. The consistency of SCCs’ electromechanical properties is examined using s les fabricated in different batches following the same protocol. We further utilize the fabricated SCCs to realize various intelligent tactile sensing and heating platforms. The capability demonstrated for the ASPP shows its potential in fabricating SCCs for applications in soft robotics and wearable devices.
Novel reversible and switchable electrolytes based on magneto-rheology
Publisher: Springer Science and Business Media LLC
Date: 23-10-2015
DOI: 10.1038/SREP15663
Abstract: Replacing organic liquid electrolytes with solid electrolytes has led to a new perspective on batteries, enabling high-energy battery chemistry with intrinsically safe cell designs. However, most solid/gel electrolytes are easily deformed under extreme deformation, leakage and/or short-circuiting can occur. Here, we report a novel magneto-rheological electrolyte (MR electrolyte) that responds to changes in an external magnetic field the electrolyte exhibits low viscosity in the absence of a magnetic field and increased viscosity or a solid-like phase in the presence of a magnetic field. This change from a liquid to solid does not significantly change the conductivity of the MR electrolyte. This work introduces a new class of magnetically sensitive solid electrolytes that can enhance impact resistance and prevent leakage from electronic devices through reversible active switching of their mechanical properties.
Reduced graphene oxide-cuprous oxide composite via facial deposition for photocatalytic dye-degradation
Publisher: Elsevier BV
Date: 08-2013
Modeling and experimental investigation on the mechanical behavior of a spiral-type capsule in the small intestine
Publisher: IEEE
Date: 07-2013
Investigation of trapping process in “Centrifuge-on-a-chip”
Publisher: IEEE
Date: 07-2013
Modeling and Experimental Investigation of Rotational Resistance of a Spiral-Type Robotic Capsule Inside a Real Intestine
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2013
Side-slip angle estimation based lateral dynamics control for omni-directional vehicles with optimal steering angle and traction/brake torque distribution
Publisher: Elsevier BV
Date: 09-2015
Fundamentals of differential particle inertial focusing in symmetric sinusoidal microchannels
Publisher: American Chemical Society (ACS)
Date: 23-01-2019
DOI: 10.1021/ACS.ANALCHEM.8B05712
Abstract: Focusing and separation of particles such as cells at high throughput is extremely attractive for biomedical applications. Particle manipulation based on inertial effects requires a high flow speed and thus is well-suited to high-throughput applications. Recently, inertial focusing and separation using curvilinear microchannels has been attracting a great amount of interest because of the linear structure for parallelization, small device footprint, superior particle-focusing performance, and easy implementation of particle separation. However, the curvature directions of these microchannels alternate, leading to variations in both the magnitude and direction of the induced secondary flow. Accumulation of this variation along the channel causes unpredictable behaviors of particles. This paper systematically investigates the inertial-focusing phenomenon in low-aspect-ratio symmetric sinusoidal channels. First, we comprehensively studied the effects of parameters such as viscosity, flow conditions, particle size, and geometric dimensions of the microchannel on differential particle focusing. We found that particle inertial focusing is generally independent of fluid kinematic viscosity but highly dependent on particle size, flow conditions, and channel dimensions. Next, we derived an explicit scaling factor and included all four dimensionless parameters (particle-blockage ratio, curvature ratio, Dean number, and channel aspect ratio) in a single operational map to illustrate the particle-focusing patterns. Finally, we proposed a rational guideline to intuitively instruct the design of channel dimensions for separation of a given particle mixture.
Development and simulation evaluation of a magnetorheological elastomer isolator for seat vibration control
Publisher: SAGE Publications
Date: 06-02-2012
Abstract: Driver fatigue is one of the leading factors contributing to road crashes. Environmental stress, such as unwanted seat vibration, is a key contributor to fatigue. This article presents the design and development of a magnetorheological elastomer isolator for a seat suspension system. By altering the magnetorheological elastomer isolator’s stiffness through a controllable magnetic field and selecting suitable control strategy, the system’s natural frequency can be changed to avoid resonance, which consequently reduce the vehicle’s vibration energy input to seat, and thus suppress the seat’s response. Experimental results show that the developed magnetorheological elastomer isolator is able to reduce vibration more when compared with the passive isolation system, indicating the significant potential of its application in vehicle seat vibration control.
A New Generation of Magnetorheological Vehicle Suspension System With Tunable Stiffness and Damping Characteristics
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2019
Solar medium-low temperature thermal utilization and effect analysis of boundary condition: A tutorial
Publisher: Elsevier BV
Date: 02-2020
An inverted micro-mixer based on a magnetically-actuated cilium made of Fe doped PDMS
Publisher: IOP Publishing
Date: 24-08-2016
Integrated Dynamics Control and Energy Efficiency Optimization for Overactuated Electric Vehicles
Publisher: Wiley
Date: 08-11-2018
DOI: 10.1002/ASJC.1686
Analysis of dielectrophoretic electrode arrays for nanoparticle manipulation
Publisher: Elsevier BV
Date: 08-2004
Static and dynamic experiment evaluations of a displacement differential self-induced magnetorheological damper
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/295294
Abstract: This paper presents the development of a novel magnetorheological d er (MRD) which has a self-induced ability. In this study, a linear variable differential sensor (LVDS) based on the electromagnetic induction mechanism was integrated with a conventional MRD. The structure of the displacement differential self-induced magnetorheological d er (DDSMRD) was developed, and the theory of displacement differential self-induced performance was deduced. The static experiments of the DDSMRD under different displacement positions were carried out by applying sine excitation signals to the excitation coils, and the experimental results show that the self-induced voltage is proportional to the d er piston displacement. Meanwhile, the dynamic experiments were also carried out using the fatigue test machine to investigate the change of the self-induced voltage under the typical direct current inputs and the different piston rod displacements the experimental results also show that the self-induced voltage is proportional to the d er piston displacements. Additionally, the dynamic mechanical performance of the DDSMRD was evaluated. The theory deduction and the experimental results indicate that the proposed DDSMRD has the ability of the integrated displacement sensor in addition to the output controllable d ing force.
Continuous plasma extraction under viscoelastic fluid in a straight channel with asymmetrical expansion–contraction cavity arrays
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6LC00843G
Abstract: By exploiting the Dean-flow-coupled elasto-inertial effects, continuous, sheathless, and high purity plasma extraction under viscoelastic fluid in a straight channel with asymmetrical expansion–contraction cavity arrays (ECCA channel) is demonstrated.
Numerical modeling of dielectrophoresis using a meshless approach
Publisher: IOP Publishing
Date: 08-04-2005
A New Torque Distribution Strategy for Blended Anti-Lock Braking Systems of Electric Vehicles Based on Road Conditions and Driver's Intentions
Publisher: SAE International
Date: 05-04-2016
DOI: 10.4271/2016-01-0461
Development of a torsional dynamic absorber using a magnetorheological elastomer for vibration reduction of a powertrain test rig
Publisher: SAGE Publications
Date: 08-05-2013
A Laminated Gravity‐Driven Liquid Metal‐Doped Hydrogel of Unparalleled Toughness and Conductivity
Publisher: Wiley
Date: 06-10-2023
Robust active control of an integrated suspension system
Publisher: Institution of Engineering and Technology
Date: 22-11-2013
DOI: 10.1049/PBCE092E_CH3
A Novel Ferrofluid Rolling Robot: Design, Manufacturing, and Experimental Analysis
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Microstructure and magnetorheology of graphite-based MR elastomers
Publisher: Springer Science and Business Media LLC
Date: 29-06-2011
Fabrication and characterization of a magnetic micro-actuator based on deformable Fe-doped PDMS artificial cilium using 3D printing
Publisher: IOP Publishing
Date: 10-02-2015
Electroactive polymers as soft robotic actuators: Electromechanical modeling and identification
Publisher: IEEE
Date: 07-2013
Tracking control of wheel slip ratio with velocity estimation for vehicle anti-lock braking system
Publisher: IEEE
Date: 05-2015
Design and Experimental Testing of an Adaptive Magneto-Rheological Elastomer Base Isolator
Publisher: IEEE
Date: 07-2013
Modelling and identifying the parameters of a magneto-rheological damper with a force-lag phenomenon
Publisher: Elsevier BV
Date: 08-2014
A Nanomechanical Analysis of Deformation Characteristics of 6H-SiC Using an Indenter and Abrasives in Different Fixed Methods
Publisher: MDPI AG
Date: 18-05-2019
DOI: 10.3390/MI10050332
Abstract: The super-precise theory for machining single crystal SiC substrates with abrasives needs to be improved for its chemical stability, extremely hard and brittle. A Berkovich indenter was used to carry out a systematic static stiffness indentation experiments on single crystal 6H-SiC substrates, and then these substrates were machined by utilizing fixed, free, and semi-fixed abrasives, and the nanomechanical characteristics and material removal mechanisms using abrasives in different fixed methods were analyzed theoretically. The results indicated that the hardness of C faces and Si faces of single crystal 6H-SiC under 500 mN load were 38.596 Gpa and 36.246 Gpa respectively, and their elastic moduli were 563.019 Gpa and 524.839 Gpa, respectively. Moreover, the theoretical critical loads for the plastic transition and brittle fracture of C face of single crystal 6H-SiC were 1.941 mN and 366.8 mN, while those of Si face were 1.77 mN and 488.67 mN, respectively. The 6H-SiC materials were removed by pure brittle rolling under three-body friction with free abrasives, and the process parameters determined the material removal modes of 6H-SiC substrates by grinding with fixed abrasives, nevertheless, the materials were removed under full elastic-plastic deformation in cluster magnetorheological finishing with semi-fixed abrasives.
A hybrid magnetorheological elastomer-fluid (MRE-F) isolation mount: Development and experimental validation
Publisher: IOP Publishing
Date: 11-12-2015
An Effective Localization Method for Robotic Endoscopic Capsules Using Multiple Positron Emission Markers
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2014
Experimental Vibration Simulation for Heavy Duty Vehicle Seat Suspension with a Multiple-DOF Motion Platform
Publisher: SAE International
Date: 14-04-2015
DOI: 10.4271/2015-01-0613
Development of an isolator working with magnetorheological elastomers and fluids
Publisher: Elsevier BV
Date: 2017
Inertial Microfluidic Purification of Floating Cancer Cells for Drug Screening and Three-Dimensional Tumor Models
Publisher: American Chemical Society (ACS)
Date: 25-06-2020
An Innovative Two-Layer Multiple-DOF Seat Suspension for Vehicle Whole Body Vibration Control
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2018
A Nonlinearly Broadband Tuneable Energy Harvester
Publisher: ASME International
Date: 17-10-2016
DOI: 10.1115/1.4034321
Abstract: A nonlinearly broadband tuneable energy harvesting device has been designed, fabricated, and tested based on the nonlinear dynamical response of a parametrically excited cl ed–cl ed beam carrying a central point mass as the core element a tuning mechanism in the form of an initial axial displacement applied to one of the cl ed–cl ed beam ends has been introduced to the system which enables tuning of device's natural frequency. Magnets have been used as the central point mass which generates a backward electromotive force (EMF) as they move through a coil when parametrically excited. The tuning parameter was set to a value for which the primary and principal nonlinear resonant regions become close to each other hence, the frequency bandwidth is broadened substantially, leading to a larger amount of electrical power harvested moreover, the nonlinear behavior, due to flexural/restoring-electromagnetic couplings, increased the operating bandwidth considerably. The system was parametrically excited using an electrodynamic shaker, and the corresponding motions of the magnets were measured. By increasing the tuning parameter, the fundamental natural frequency reduces and the system nonlinearity significantly increases it has been discovered that when the initial axial displacement is approximately the thickness of the beam the fundamental and principal parametric resonance branches combine thus, the frequency bandwidth (and hence the range of the energy harvested) is significantly increased due to the parametric excitation, nonlinear behavior, and initial axial displacement.
Design and testing of an MR steering damper for motorcycles
Publisher: Springer Science and Business Media LLC
Date: 09-2003
Semi-active control of an integrated full-car suspension with seat suspension and driver body model using ER dampers
Publisher: Inderscience Publishers
Date: 2013
Investigation of humping phenomenon for the multi-directional robotic wire and arc additive manufacturing
Publisher: Elsevier BV
Date: 06-2020
A variable stiffness MR damper for vibration suppression
Publisher: IEEE
Date: 07-2009
Magnetorheological properties of aqueous ferrofluids
Publisher: Society of Rheology Japan
Date: 2006
A label-free and high-throughput separation of neuron and glial cells using an inertial microfluidic platform
Publisher: AIP Publishing
Date: 05-2016
DOI: 10.1063/1.4949770
Abstract: While neurons and glial cells both play significant roles in the development and therapy of schizophrenia, their specific contributions are difficult to differentiate because the methods used to separate neurons and glial cells are ineffective and inefficient. In this study, we reported a high-throughput microfluidic platform based on the inertial microfluidic technique to rapidly and continuously separate neurons and glial cells from dissected brain tissues. The optimal working condition for an inertial biochip was investigated and evaluated by measuring its separation under different flow rates. Purified and enriched neurons in a primary neuron culture were verified by confocal immunofluorescence imaging, and neurons performed neurite growth after separation, indicating the feasibility and biocompatibility of an inertial separation. Phencyclidine disturbed the neuroplasticity and neuron metabolism in the separated and the unseparated neurons, with no significant difference. Apart from isolating the neurons, purified and enriched viable glial cells were collected simultaneously. This work demonstrates that an inertial microchip can provide a label-free, high throughput, and harmless tool to separate neurological primary cells.
Study of PDMS based magnetorheological elastomers
Publisher: IOP Publishing
Date: 15-02-2013
Study of magnetorheology and sensing capabilities of MR elastomers
Publisher: IOP Publishing
Date: 15-02-2013
Optimal design and size of a desiccant cooling system with onsite energy generation and thermal storage using a multilayer perceptron neural network and a genetic algorithm
Publisher: Elsevier BV
Date: 2019
Modular off-chip emulsion generator enabled by a revolving needle
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0LC00939C
Abstract: An integrated revolving needle emulsion generator (RNEG) is developed to achieve high-throughput production of monodispersed droplets in an off-chip manner.
Design and fabrication of microfluidic mixer from carbonyl iron–PDMS composite membrane
Publisher: Springer Science and Business Media LLC
Date: 12-10-2010
Multiobjective Control Strategies of a Novel Multifunction Electrically Interconnected Suspension
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
A Magnetorheological Fluid-Filled Soft Crawling Robot With Magnetic Actuation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Sheathless separation of microalgae from bacteria using a simple straight channel based on viscoelastic microfluidics.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9LC00482C
Abstract: Microalgae cells have been recognized as a promising sustainable resource to meet worldwide growing demands for renewable energy, food, livestock feed, water, cosmetics, pharmaceuticals, and materials. In order to ensure high-efficiency and high-quality production of biomass, biofuel, or bio-based products, purification procedures prior to the storage and cultivation of the microalgae from contaminated bacteria are of great importance. The present work proposed and developed a simple, sheathless, and efficient method to separate microalgae Chlorella from bacteria Bacillus Subtilis in a straight channel using the viscoelasticity of the medium. Microalgae and bacteria migrate to different lateral positions closer to the channel centre and channel walls respectively. Fluorescent microparticles with 1 μm and 5 μm diameters were first used to mimic the behaviours of bacteria and microalgae to optimize the separating conditions. Subsequently, size-based separation in Newtonian fluid and in viscoelastic fluid in straight channels with different aspect ratios was compared and demonstrated. Under the optimal condition, the removal ratio for 1 μm microparticles and separation efficiency for 5 μm particles can reach up to 98.28% and 93.85% respectively. For bacteria and microalgae cells separation, the removal ratio for bacteria and separation efficiency for microalgae cells is 92.69% and 100% respectively. This work demonstrated the continuous and sheathless separation of microalgae from bacteria for the first time by viscoelastic microfluidics. This technique can also be applied as an efficient and user-friendly method to separate mammalian cells or other kinds of cells.
An experimental investigation into nonlinear dynamics of a magneto-rheological elastomer sandwich beam
Publisher: IOP Publishing
Date: 08-12-2015
Precise locomotion controller design for a novel magnetorheological fluid robot based on improved gray wolf optimization algorithm
Publisher: IOP Publishing
Date: 22-01-2021
Abstract: Spherical magnetorheological fluid (MRF) robots are capable to move in narrow space, which can be used for drug releasing to human stomach however, the magnetic-controlled rolling movement often generates a large displacement error, which greatly hinders the practical applications of the MRF robots. In order to bridge this research gap, this paper introduces a new MRF robot with a precise locomotion controller. In this control system, a data acquisition system is designed for the MRF robot and an optimal proportion integration differentiation (PID) controller is proposed based on an improved grey wolf optimization algorithm (IGWO). Both simulations and experiments have been performed to verify the performance of the locomotion controller. The simulation results show that the proposed IGWO-PID controller is superior to the conventional PID and GWO PID controller, with faster response output and smaller overshoot. Experimental analysis results demonstrate the proposed MRF robot can move in a complex trace with a speed fluctuation rate below 5.4%. As a result, precise locomotion has been achieved to make the new MRF robot ready for medicine delivery in narrow space.
Study on the damping properties of magnetorheological elastomers based on cis-polybutadiene rubber
Publisher: Elsevier BV
Date: 06-2008
Real-time control of inertial focusing in microfluidics using dielectrophoresis (DEP)
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA13075H
Abstract: In this work, we explored the possibility of combining dielectrophoresis (DEP) and inertial focusing in a fully coupled manner and proposed a new concept, which is called DEP-inertial microfluidics. A vertical DEP force is used to tune the inertial focusing pattern and position in three dimensions.
NUMERICAL SOLUTION OF TRAVELING WAVE DIELECTROPHORESIS USING A MESHLESS FINITE DIFFERENCE SCHEME
Publisher: World Scientific Pub Co Pte Lt
Date: 20-12-2005
DOI: 10.1142/S0217984905010359
Abstract: This paper presents a numerical solution for the four-phase traveling dielectrophoresis (DEP) using a novel meshless method - weighted least square finite difference (LSFD) scheme. The exact boundary condition and nonuniform point distribution were used in the calculation. Numerical results including the electrical potential, electrical field, traveling DEP forces and particle behavior are presented. Although the LSFD scheme was originally proposed in solving incompressible viscous flow, it is further demonstrated in this paper that the method is also well suited for solving all kinds of DEP problems in which extremely high gradient of electric field exists in the computational domain, e.g. edges of the electrodes. The LSFD method enables the computational ease of free point/mesh distribution in these areas and hence save the computational efforts.
A bionic soft tongue driven by shape memory alloy and pneumatics
Publisher: IOP Publishing
Date: 15-06-2021
A controllable mechanical motion rectifier-based semi-active magnetorheological inerter for vibration control
Publisher: IOP Publishing
Date: 08-10-2020
Abstract: The conventional semi-active variable d ing (VD) device can only dissipate the vibration energy, which inherently limits its performance in vibration control. This paper proposes a novel semi-active inerter concept and develops a prototype with magnetorheological (MR) d ers, which can store the vibration energy in a flywheel and then release it to suppress vibration. The new idea is inspired by a variable inertance (VI) device, which has a VD device and a passive inerter in serial, and a passive mechanical motion rectifier (MMR), which can convert the reciprocating input into a unidirectional output. The controllable MMR (CMMR) applies two VD devices to replace the two one-way roller clutches in the MMR. By equipping the CMMR, the semi-active inerter gets more controllability than the original VI device because it can switch the torque and motion transmitting routes between the device terminals and the flywheel in it. The frequency-domain analysis validates the versatile of the semi-active inerter, which can work in VD and VI modes. The test results of the semi-active MR inerter prototype are used to identify the device parameters, which are applied for the control simulation. The semi-active MR inerter in CMMR mode has the best torque tracking performance with a given test condition, and it has a 20.13% improvement than in the VD mode. Then, a seat suspension with the semi-active MR inerter is applied to validate the effectiveness of the device in vibration control. The results show that the vibration reduction of the seat suspension in the CMMR mode is 39.3% higher than in the VD mode, which indicates a significant improvement of ride comfort. The new concept of the semi-active device has excellent potential in vibration control and is promising in practical applications.
Hybrid microfluidics combined with active and passive approaches for continuous cell separation
Publisher: Wiley
Date: 27-10-2017
Abstract: Microfluidics, which is classified as either active or passive, is capable of separating cells of interest from a complex and heterogeneous s le. Active methods utilise external fields such as electric, magnetic, acoustic, and optical to drive cells for separation, while passive methods utilise channel structures, intrinsic hydrodynamic forces, and steric hindrances to manipulate cells. However, when processing complex biological s les such as whole blood with rare cells, separation with a single module microfluidic device is difficult. Hybrid microfluidics is an emerging technique, which utilises active and passive methods whilst fulfilling higher requirements for stable performance, versatility, and convenience, including (i) the ability to process multi-target cells, (ii) enhanced ability for multiplexed separation, (iii) higher sensitivity, and (iv) tunability for a wider operational range. This review introduces the fundamental physics and typical formats for subclasses of hybrid microfluidic devices based on their different physical fields presents current ex les of cell sorting to highlight the advantage and usefulness of hybrid microfluidics on biomedicine, and then discusses the challenges and perspective of future development and the promising direction of research in this field.
Variable stiffness and damping magnetorheological isolator
Publisher: Springer Science and Business Media LLC
Date: 23-04-2009
Development of adaptive seismic isolators for ultimate seismic protection of civil structures
Publisher: SPIE
Date: 19-04-2013
DOI: 10.1117/12.2009626
Fault-tolerant control of electric vehicles with in-wheel motors using actuator-grouping sliding mode controllers
Publisher: Elsevier BV
Date: 05-2016
Linear viscoelasticity of MR fluids: Dependence on magnetic fields
Publisher: World Scientific Pub Co Pte Lt
Date: 10-04-2005
DOI: 10.1142/S0217979205030062
Abstract: The paper presents investigation of dynamic properties of MR fluids by using a rheometer with parallel-plate geometry. The s le is reduced iron powder based MR suspensions. Linear viscoelastic properties of such s le, which can be variably controlled using a magnetic field, are obtained and summarized based on oscillatory tests. Four field-induced regimes, I, II, III, and IV, are found in the system, which are defined by three critical field strengths: B C1 B C2 B C3 . MR fluids in regime I through IV experience four typical structural convolutions: coexisting of particles and random chains coexisting of chains and random clusters coexisting of clusters and chains stable clusters. Such results are in good accord with experimental results achieved by Liu's group using light scattering techniques.
Shock Absorption for Legged Locomotion through Magnetorheological Leg-Stiffness Control
Publisher: MDPI AG
Date: 06-02-2023
Abstract: The objective of this study was to evaluate the performance of a magnetorheological-fluid-based variable stiffness actuator leg under high impact forces through optimal tuning and control of stiffness and d ing properties. To achieve this, drop testing experiments were conducted with the leg at various drop heights and payload masses. The results showed that while lower stiffness and higher d ing can lead to lower impact forces and greater energy dissipation, respectively, optimal control can also protect the leg from deflecting beyond its functional range. Comparison with a rigid leg with higher d ing showed a 57.5% reduction in impact force, while a more compliant leg with lower d ing results in a 61.4% reduction. These findings demonstrate the importance of considering both stiffness and d ing in the design of legged robots for high impact force resistance. This simultaneously highlights the efficacy of the proposed magnetorheological-fluid-based leg design for this purpose.
Improved Mathematical Model for Analysis of the Payne Effect of Magnetorheological Elastomers
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2018
Development of a biomimetic scallop robot capable of jet propulsion
Publisher: IOP Publishing
Date: 20-03-2020
Study of the temperature effect of shear thickening fluid
Publisher: IEEE
Date: 07-2013
A mapreduce-based ELM for regression in big data
Publisher: Springer International Publishing
Date: 2016
An investigation into biomechanical and biotribological properties of a real intestine for design of a spiral-type robotic capsule
Publisher: IEEE
Date: 07-2013
A tunable magneto-rheological fluid-filled beam-like vibration absorber
Publisher: IOP Publishing
Date: 09-04-2010
Integrated trajectory planning and control for obstacle avoidance manoeuvre using non-linear vehicle MP algorithm
Publisher: Institution of Engineering and Technology (IET)
Date: 05-12-2019
High sensitivity face shear magneto-electric composite array for weak magnetic field sensing
Publisher: AIP Publishing
Date: 11-08-2020
DOI: 10.1063/5.0011931
Abstract: A magnetic field sensor is designed and fabricated using a piezoelectric face shear mode Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMN–PT)/Metglas magneto-electric (ME) composite. An outstanding ME coupling coefficient up to 1600 V/(cm Oe) was experimentally achieved, being ∼50% higher than the value from the extensional PMN–PT/Metglas ME composite with the same volume. The detection limit was found to be 2 × 10−6 Oe for the DC magnetic field, while it was 2 × 10−8 Oe for the AC magnetic field. The sensitivity of the face shear mode PMN–PT/Metglas ME composite is about one order of magnitude higher than that of a 32 extensional mode PMN–PT/Metglas based ME composite in sensing a weak DC magnetic field. A sensing array was also designed based on the ME composite to image weak DC magnetic fields, demonstrating a great potential promising for sensing weak magnetic fields.
Fabrication of metallic parts with overhanging structures using the robotic wire arc additive manufacturing
Publisher: Elsevier BV
Date: 03-2021
A Novel Reaching Law for Sliding Mode Control of Uncertain Discrete-Time Systems
Publisher: Hindawi Limited
Date: 15-08-2018
DOI: 10.1155/2018/6158492
Abstract: This paper proposed a new sliding mode control algorithm for discrete-time systems with matched uncertainty. The new control algorithm is characterized by a new discrete switching surface. Although the exponential reaching law can reduce oscillation, the control effectiveness will be suppressed when the rate of change of disturbance is high. The exponential reaching law cannot force the system states to approach sliding surface s k = 0 . In order to solve the contradiction between guaranteeing the basic property of quasi-sliding mode and reducing oscillation, a new discrete reaching law is proposed to improve the reaching process of discrete exponent reaching laws. The proposed method not only can force system state to approach the sliding surface s k = 0 in less width of the switching manifold than existing studies, but also can alleviate chattering when the system representative points are near zero point. Simulation results are provided to validate the feasibility and reasonability of the method.
An active-compliant micro-stage based on EAP artificial muscles
Publisher: IEEE
Date: 07-2014
Effect of maleic anhydride on the damping property of magnetorheological elastomers
Publisher: IOP Publishing
Date: 31-03-2010
A Novel Observer Design for Simultaneous Estimation of Vehicle Steering Angle and Sideslip Angle
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2016
A Parametrically Broadband Nonlinear Energy Harvester
Publisher: ASME International
Date: 10-10-2016
DOI: 10.1115/1.4034514
Abstract: In this work, for the first time, an energy harvester based on the nonlinear dynamical response of a parametrically excited cantilever beam in contact with mechanical stoppers has been fabricated and tested a 145% increase in the bandwidth at which energy can be effectively harvested has been observed. Experimental and theoretical investigations have been performed in order to assess the increased operating bandwidth of the energy harvester fabricated for the experimental investigations, an electrodynamic shaker connected to a shaking table has been used to parametrically stimulate the energy harvesting device. Results showed that the parametric energy harvester without stoppers displayed a weak softening-type nonlinear response however, with the addition of mechanical stoppers the energy harvester displayed a strong hardening-type nonlinear response which is ideal for capturing kinetic energy over larger bandwidths. The addition of mechanical stoppers on a parametrically excited cantilever beam has significant qualitative and quantitative effects on the nonlinear parametric energy harvesting the energy harvesting bandwidth was increased in the range of 35–145% by adjusting the stoppers.
A microslip model of the bonding process in ultrasonic wire bonders Part I: Transient response
Publisher: Springer Science and Business Media LLC
Date: 24-03-2006
Creep and recovery behaviors of magnetorheological elastomers
Publisher: Springer Science and Business Media LLC
Date: 03-06-2010
Isolating plasma from blood using a dielectrophoresis-active hydrophoretic device
Publisher: Royal Society of Chemistry (RSC)
Date: 18-06-2014
DOI: 10.1039/C4LC00343H
Abstract: Plasma is a complex substance that contains proteins and circulating nucleic acids and viruses that can be utilised for clinical diagnostics, albeit a precise analysis depends on the plasma being totally free of cells. We proposed the use of a dielectrophoresis (DEP)-active hydrophoretic method to isolate plasma from blood in a high-throughput manner. This microfluidic device consists of anisotropic microstructures embedded on the top of the channel which generate lateral pressure gradients while interdigitised electrodes lay on the bottom of the channel which can push particles or cells into a higher level using a negative DEP force. Large and small particles or cells (3 μm and 10 μm particles, and red blood cells, white blood cells, and platelets) can be focused at the same time in our DEP-active hydrophoretic device at an appropriate flow rate and applied voltage. Based on this principle, all the blood cells were filtrated from whole blood and then the plasma was extracted with a purity of 94.2% and a yield of 16.5% at a flow rate of 10 μL min(-1). This solved the challenging problem caused by the relatively low throughput of the DEP based device. Our DEP-active hydrophoretic device is a flexible and tunable system that can control the lateral positions of particles by modulating the external voltages without redesigning and fabricating a new channel, and because it is easy to operate, it is easily compatible with other microfluidic platforms that are used for further detection.
An active seat suspension design for vibration control of heavy-duty vehicles
Publisher: SAGE Publications
Date: 17-11-2016
Abstract: This paper presents the design, fabrication and testing of an innovative active seat suspension system for heavy-duty vehicles. Rather than using conventional linear actuators, such as hydraulic cylinders or linear motors, which need to be well maintained and are always expensive when high force outputs are required, the proposed seat suspension system directly applies a rotary motor in order to provide the required active actuation, without changing the basic structure of the existing off-the-shelf seat suspension. A gear reducer is also applied to lify the output torque of the motor so that a high output torque can be achieved using a low rated power motor. A static output feedback [Formula: see text] controller with friction compensation is designed to actively reduce seat vibration. Experiments are carried out to test the fabricated suspension prototype. The experimental results show that this type of seat suspension can achieve greater ride comfort in the frequency range of 2–6 Hz than a passive seat suspension. The newly designed active seat suspension is much more cost effective and can be suitable for heavy-duty vehicles.
Robust fuzzy tracking control of uncertain steer-by-wire systems with network time delays
Publisher: IEEE
Date: 09-2015
Study on magnetorheological shear thickening fluid
Publisher: IOP Publishing
Date: 17-01-2008
Microfluidic Mass Production of Stabilized and Stealthy Liquid Metal Nanoparticles
Publisher: Wiley
Date: 22-04-2018
Abstract: Functional nanoparticles comprised of liquid metals, such as eutectic gallium indium (EGaIn) and Galinstan, present exciting opportunities in the fields of flexible electronics, sensors, catalysts, and drug delivery systems. Methods used currently for producing liquid metal nanoparticles have significant disadvantages as they rely on both bulky and expensive high-power sonication probe systems, and also generally require the use of small molecules bearing thiol groups to stabilize the nanoparticles. Herein, an innovative microfluidics-enabled platform is described as an inexpensive, easily accessible method for the on-chip mass production of EGaIn nanoparticles with tunable size distributions in an aqueous medium. A novel nanoparticle-stabilization approach is reported using brushed polyethylene glycol chains with trithiocarbonate end-groups negating the requirements for thiol additives while imparting a "stealth" surface layer. Furthermore, a surface modification of the nanoparticles is demonstrated using galvanic replacement and conjugation with antibodies. It is envisioned that the demonstrated microfluidic technique can be used as an economic and versatile platform for the rapid production of liquid metal-based nanoparticles for a range of biomedical applications.
A Review on Chatter in Robotic Machining Process Regarding Both Regenerative and Mode Coupling Mechanism
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Overcoming the conflict requirement between high-speed stability and curving trafficability of the train using an innovative magnetorheological elastomer rubber joint
Publisher: SAGE Publications
Date: 03-04-2018
Testing and steady state modeling of a linear MR damper under sinusoidal loading
Publisher: IOP Publishing
Date: 02-2000
Implementation of Adaptive Neuro Fuzzy Inference System controller on magneto rheological damper suspension
Publisher: IEEE
Date: 07-2013
Stability Analysis for $ H_{\infty}$-Controlled Active Quarter-Vehicle Suspension Systems With a Resilient Event-Triggered Scheme Under Periodic DoS Attacks
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Tunable particle separation in a hybrid dielectrophoresis (DEP)- inertial microfluidic device
Publisher: Elsevier BV
Date: 08-2018
A portable, hand-powered microfluidic device for sorting of biological particles
Publisher: Springer Science and Business Media LLC
Date: 12-12-2018
A hybrid MRE isolation system integrated with ball-screw inerter for vibration control
Publisher: IOP Publishing
Date: 20-12-2021
Abstract: Magnetorheological elastomer (MRE), as a field-dependent smart material, has been widely applied on base isolation for vibration reduction. However, the MRE isolation system often experiences large drift during a strong earthquake, which may cause mechanical failure. Additionally, its performance among the low-frequency range is still limited. To tackle these problems, this paper proposes a hybrid vibration isolation system which is composed of four stiffness softening MRE isolators and a passive ball-screw inerter. A simulation was developed to prove the effectiveness of the hybrid isolation system before the earthquake tests. A scaled three-storey building was developed based on the scaling laws as the isolated objective in earthquake experiments. Besides, a linear quadratic regulation controller was utilised to control the mechanical properties of the hybrid MRE isolation system. Finally, the evaluation experiments of the building under a scaled Kobe earthquake excitation were conducted. The experimental results show that the simulation and the experimental results were in agreement, validating that the hybrid isolation system could provide a better vibration mitigation performance, in the meanwhile, reduce the displacement litude of the isolation system.
Investigation of a wearable piezoelectric-IMU multi-modal sensing system for real-time muscle force estimation
Publisher: IOP Publishing
Date: 10-05-2023
Abstract: Piezoelectric based ultrasonic transducer shows a promising application prospect in the wearable muscle force estimator by detecting the morphological-biochemical peculiarity of human motion. However, due to the nonlinearity of muscle contraction, muscle force estimation in a dynamic motion, such as leg lifting, is still a challenge. In this study, a wearable multi-sensory system was developed for muscle force estimation in the isometric contraction assessment and during the dynamic training. A customized wearable ultrasound system was adopted for real-time deformation measurement of muscle, and an inertial measurement unit sensor was utilized to detect the joint angle. Thus, the muscle force can be predicted by identifying the muscle deformation as well as considering the muscle thickness change caused by the joint angel variation. The robustness and efficiency of the system was investigated by evaluating the muscle force of the rectus femoris during the isometric contraction assessment and the knee’s dynamic exercise. The accuracy of muscle force prediction is over 90%. During the knee’s dynamic exercise, the predicted force output of the lower-limb agreed well with the measured value, demonstrating the promising application of the system in dynamic muscle force estimation. This approach can provide real-time muscle force information for the patients to improve the rehabilitative training effect when using an exoskeletal rehabilitation robot as well as evaluate their recovery situation.
Non-linear tyre model–based non-singular terminal sliding mode observer for vehicle velocity and side-slip angle estimation
Publisher: SAGE Publications
Date: 31-07-2019
Abstract: Vehicle velocity and side-slip angle are important vehicle states for the electronic stability programme and traction control system in vehicle safety control system and for the control allocation method of electric vehicles with in-wheel motors. This paper proposes an innovative side-slip angle estimator based on the non-linear Dugoff tyre model and non-singular terminal sliding mode observer. The proposed estimation method based on the non-linear tyre model can accurately present the tyre’s non-linear characteristics and can show advantages over estimation methods based on the linear tyre model. The utilised Dugoff tyre model has a relatively simple structure with few parameters, and the proposed non-linear observer can be applied in various vehicle tyres and various road conditions. Precise determination of the Dugoff tyre model parameters is not required and the proposed observer can still perform good estimation results even though tyre parameters and the tyre–road friction coefficient are not accurate. The proposed non-singular terminal sliding mode observer can achieve fast convergence rate and better estimation performance than the traditional sliding mode observer. At the end of this paper, simulations in various conditions are presented to validate the proposed non-linear estimator.
The rheology of shear thickening fluids with various ceramic particle additives
Publisher: Elsevier BV
Date: 08-2016
On the extended rutgers-delaware rule for mr suspensions under magnetic fields
Publisher: World Scientific Pub Co Pte Lt
Date: 20-02-2006
DOI: 10.1142/S0217979206033449
Abstract: The interrelation between apparent viscosity in steady shear flow and complex viscosity in oscillatory shear flow for magnetorheological (MR) suspensions is investigated. Series of experiments have been conducted using a MR rheometer. An extended Rutgers–Delaware rule is proposed, in which an effective shear rate for oscillatory shear flow is defined as ωΔ h . Here ωΔ h is the shift factor dependent on strain litude (γ 0 ), which was found to be similar for different MR suspensions under different magnetic fields. At high strain litudes (γ 0 ≥100%), Δ h ≈γ 0 , the Rutgers–Delaware rule is approximately obeyed. At low strain litudes (γ 0 %), the curves of Δ h fall between the line of the Cox–Merz rule and that of the Rutgers–Delaware rule. The curve of Δ h at low strain litudes depends on the ingredients of the MR suspension. For s les with the same ingredients, a unified curve of Δ h can be identified in a range of magnetic fields and/or for a range of volume fraction of magnetic particles.
Development of a nonlinear adaptive absorber based on magnetorheological elastomer
Publisher: SAGE Publications
Date: 04-10-2017
Variable stiffness and damping semi-active vibration control technology based on magnetorheological fluids
Publisher: SPIE
Date: 10-10-2013
DOI: 10.1117/12.2035903
Improving stability and curving passing performance for railway vehicles with a variable stiffness MRF rubber joint
Publisher: IOP Publishing
Date: 17-02-2017
A robust registration method for autonomous driving pose estimation in urban dynamic environment using LiDAR
Publisher: MDPI AG
Date: 2019
DOI: 10.3390/ELECTRONICS8010043
Abstract: The registration of point clouds in urban environments faces problems such as dynamic vehicles and pedestrians, changeable road environments, and GPS inaccuracies. The state-of-the-art methodologies have usually combined the dynamic object tracking and/or static feature extraction data into a point cloud towards the solution of these problems. However, there is the occurrence of minor initial position errors due to these methodologies. In this paper, the authors propose a fast and robust registration method that exhibits no need for the detection of any dynamic and/or static objects. This proposed methodology may be able to adapt to higher initial errors. The initial steps of this methodology involved the optimization of the object segmentation under the application of a series of constraints. Based on this algorithm, a novel multi-layer nested RANSAC algorithmic framework is proposed to iteratively update the registration results. The robustness and efficiency of this algorithm is demonstrated on several high dynamic scenes of both short and long time intervals with varying initial offsets. A LiDAR odometry experiment was performed on the KITTI data set and our extracted urban data-set with a high dynamic urban road, and the average of the horizontal position errors was compared to the distance traveled that resulted in 0.45% and 0.55% respectively.
Dean-flow-coupled elasto-inertial three-dimensional particle focusing under viscoelastic flow in a straight channel with asymmetrical expansion–contraction cavity arrays
Publisher: AIP Publishing
Date: 07-2015
DOI: 10.1063/1.4927494
Abstract: In this paper, 3D particle focusing in a straight channel with asymmetrical expansion–contraction cavity arrays (ECCA channel) is achieved by exploiting the dean-flow-coupled elasto-inertial effects. First, the mechanism of particle focusing in both Newtonian and non-Newtonian fluids was introduced. Then particle focusing was demonstrated experimentally in this channel with Newtonian and non-Newtonian fluids using three different sized particles (3.2 μm, 4.8 μm, and 13 μm), respectively. Also, the effects of dean flow (or secondary flow) induced by expansion–contraction cavity arrays were highlighted by comparing the particle distributions in a single straight rectangular channel with that in the ECCA channel. Finally, the influences of flow rates and distances from the inlet on focusing performance in the ECCA channel were studied. The results show that in the ECCA channel particles are focused on the cavity side in Newtonian fluid due to the synthesis effects of inertial and dean-drag force, whereas the particles are focused on the opposite cavity side in non-Newtonian fluid due to the addition of viscoelastic force. Compared with the focusing performance in Newtonian fluid, the particles are more easily and better focused in non-Newtonian fluid. Besides, the Dean flow in visco-elastic fluid in the ECCA channel improves the particle focusing performance compared with that in a straight channel. A further advantage is three-dimensional (3D) particle focusing that in non-Newtonian fluid is realized according to the lateral side view of the channel while only two-dimensional (2D) particle focusing can be achieved in Newtonian fluid. Conclusively, this novel Dean-flow-coupled elasto-inertial microfluidic device could offer a continuous, sheathless, and high throughput (& 000 s−1) 3D focusing performance, which may be valuable in various applications from high speed flow cytometry to cell counting, sorting, and analysis.
Factors governing mass transfer during membrane electrodialysis regeneration of LiCl solution for liquid desiccant dehumidification systems
Publisher: Elsevier BV
Date: 2017
Controllable Electrically Interconnected Suspension System for Improving Vehicle Vibration Performance
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2020
Development and characterization of a multi-layer magnetorheological elastomer isolator based on a Halbach array
Publisher: IOP Publishing
Date: 16-09-2016
Experimental and modelling study of the effect of temperature on shear thickening fluids
Publisher: Springer Science and Business Media LLC
Date: 02-2015
A Versatile Semiactive Electrically Interconnected Suspension With Heave-Roll Vibration Decoupling Control
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2023
Continuous particle manipulation and separation in a hurdle-combined curved microchannel using DC dielectrophoresis
Publisher: AIP
Date: 2013
DOI: 10.1063/1.4812140
Electro-mechano responsive elastomers with self-tunable conductivity and stiffness
Publisher: American Association for the Advancement of Science (AAAS)
Date: 27-01-2023
Abstract: Materials with programmable conductivity and stiffness offer new design opportunities for next-generation engineered systems in soft robotics and electronic devices. However, existing approaches fail to harness variable electrical and mechanical properties synergistically and lack the ability to self-respond to environmental changes. We report an electro-mechano responsive Field’s metal hybrid elastomer exhibiting variable and tunable conductivity, strain sensitivity, and stiffness. By synergistically harnessing these properties, we demonstrate two applications with over an order of magnitude performance improvement compared to state-of-the-art, including a self-triggered multiaxis compliance compensator for robotic manipulators, and a resettable, highly compact, and fast current-limiting fuse with an adjustable fusing current. We envisage that the extraordinary electromechanical properties of our hybrid elastomer will bring substantial advancements in resilient robotic systems, intelligent instruments, and flexible electronics.
A new magnetorheological damper with improved displacement differential self-induced ability
Publisher: IOP Publishing
Date: 23-07-2015
Development of a bio-inspired transformable robotic fin
Publisher: IOP Publishing
Date: 31-08-2016
DOI: 10.1088/1748-3190/11/5/056010
Abstract: Fish swim by oscillating their pectoral fins forwards and backwards in a cyclic motion such that their geometric parameters and aspect ratios change according to how fast or slow a fish wants to swim these complex motions result in a complicated hydrodynamic response. This paper focuses on the dynamic change in the shape of a fin to improve the underwater propulsion of bio-inspired mechanism. To do this, a novel transformable robotic fin has been developed to investigate how this change in shape affects the hydrodynamic forces acting on the fin. This robotic fin has a multi-link frame and a flexible surface skin where changes in shape are activated by a purpose designed multi-link mechanism driven by a transformation motor. A drag platform has been designed to study the performance of this variable robotic fin. Numerous experiments were carried out to determine how various controlling modes affect the thrust capability of this fin. The kinematic parameters associated with this robotic fin include the oscillating frequency and litude, and the drag velocity. The fin has four modes to control the cyclic motion these were also investigated in combination with the variable kinematic parameters. The results will help us understand the locomotion performance of this transformable robotic fin. Note that different controlling modes influence the propulsive performance of this robotic fin, which means its propulsive performance can be optimized in a changing environment by adapting its shape. This study facilitates the development of bio-inspired unmanned underwater vehicles with a very high swimming performance.
Electro-mechanical modelling and identification of electroactive polymer actuators as smart robotic manipulators
Publisher: Elsevier BV
Date: 04-2014
Integrated Seat And Suspension Control For A Quarter Car With Driver Model
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2012
Theoretical and experimental study on a compliant flipper-leg during terrestrial locomotion
Publisher: IOP Publishing
Date: 17-08-2016
DOI: 10.1088/1748-3190/11/5/056005
Abstract: An hibious robot with straight compliant flipper-legs can conquer various hibious environments. The robot can rotate its flipper-legs and utilize their large deflection to walk on rough terrain, and it can oscillate the straight flipper-legs to propel itself underwater. This paper focuses on the dynamics of the compliant straight flipper-legs during terrestrial locomotion by modeling its deformation dynamically with large deflection theory and simulating it to investigate the parameters of locomotion such as trajectory, velocity, and propulsion. To validate the theoretical model of dynamic locomotion, a single-leg experimental platform is used to explore the flipper-legs in motion with various structural and kinematic parameters. Furthermore, a robotic platform mounting with four compliant flipper-legs is also developed and used to experiment with locomotion. The trajectories of the rotating axle of the compliant flipper-leg during locomotion were approximately coincidental in simulation and in experiments. The speed of locomotion and cost of transport during locomotion were explored and analyzed. The performance of different types of compliant flipper-legs during locomotion shows that varying the degrees of stiffness will have a significant effect on their locomotion. The dynamic model and analysis of the compliant flipper-leg for terrestrial locomotion facilitates the ability of hibious robots to conquer complex environments.
A wheeled robot driven by a liquid-metal droplet
Publisher: Wiley
Date: 15-10-2018
Abstract: The controlled actuation of gallium liquid-metal (LM) alloys has presented new and exciting opportunities for constructing mobile robots with structural flexibility. However, the locomotion of current LM-based actuators often relies on inducing a gradient of interfacial tension on the LM surface within electrolytes, which limits their application outside a liquid environment. In this work, a wheeled robot using a LM droplet as the core of the driving system is developed that enables it to move outside liquid environment. The LM droplet inside the robot is actuated using a voltage to alter the robot's center of gravity, which in turn generates a rolling torque and induces continuous locomotion at a steady speed. A series of experiments is carried out to examine the robot's performance and then to develop a dynamic model using the Lagrange method to understand the locomotion. An untethered and self-powered wheeled robot that utilizes mini-lithium-batteries is also demonstrated. This study is envisaged to have the potential to expand current research on LM-based actuators to realize future complex robotic systems.
Development and evaluation of an MRE-based absorber with two individually controllable natural frequencies
Publisher: IOP Publishing
Date: 31-07-2018
A magnetorheological elastomer rail damper for wideband attenuation of rail noise and vibration
Publisher: SAGE Publications
Date: 30-08-2019
Abstract: The noise and vibration effects of rails can have a significant impact on the environment surrounding the railways. Rail d ers are elements that are attached to the sides of the rail and can improve the track decay rate of rail and then enhance the rails’ ability to attenuate noises and vibrations. However, in practical applications, the most efficient rail d er design still cannot adjust its own parameters to adapt to different requirements because their stiffness and d ing are fixed after designed. In this work, a tunable magnetorheological elastomer rail d er that works on the principle of a dynamic vibration absorber has been designed, analysed, characterised, and experimentally tested for the suppression of railway noise and vibration. The new rail d er incorporates variable stiffness magnetorheological elastomer layers, whose stiffness can be controlled by an externally applied magnetic field, to realise adaptive characteristics. Experimental characterisations of the magnetorheological elastomer rail d er were performed with an electromagnetic shaker. Subsequently, theoretical predictions of the track decay rate of a UIC-60 rail with different rail d ers and without rail d er were conducted simulation results verified that magnetorheological elastomer rail d ers can improve the track decay rate of rail over a wider frequency range compared to conventional rail d ers and thus the performance of the magnetorheological elastomer rail d er outperforms other conventional rail d ers on rail noise reduction.
Simple, low-cost fabrication of semi-circular channel using the surface tension of solder paste and its application to microfluidic valves
Publisher: Wiley
Date: 06-04-2018
Abstract: This work presents a simple, low-cost method to fabricate semi-circular channels using solder paste, which can amalgamate the cooper surface to form a half-cylinder mold using the surface tension of Sn-Pd alloy (the main component in solder paste). This technique enables semi-circular channels to be manufactured with different dimensions. These semi-circular channels will then be integrated with a polymethylmethacrylate frame and machine screws to create miniaturized, portable microfluidic valves for sequential liquid delivery and particle synthesis. This approach avoids complicated fabrication processes and expensive facilities and thus has the potential to be a useful tool for lab-on-a-chip applications.
Modeling and Experimental Characterization of Propulsion of a Spiral-Type Microrobot for Medical Use in Gastrointestinal Tract
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2013
Microdroplet-based universal logic gates by electrorheological fluid
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1SM05687E
Bioparticle separation and manipulation using dielectrophoresis
Publisher: Elsevier BV
Date: 02-2007
A novel cost effective method for vehicle tire-road friction coefficient estimation
Publisher: IEEE
Date: 07-2013
Lab on a chip for continuous-flow magnetic cell separation
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4LC01422G
Abstract: We review the fundamental physics in continuous-flow magnetic cell separation and identify the optimisation parameters of LOC devices.
Liquid metal based triboelectric nanogenerator with excellent electrothermal and safeguarding performance towards intelligent plaster
Publisher: Elsevier BV
Date: 05-2023
Experimental investigation of the vibration characteristics of a magnetorheological elastomer sandwich beam under non-homogeneous small magnetic fields
Publisher: IOP Publishing
Date: 28-11-2011
A variable resonance magnetorheological-fluid-based pendulum tuned mass damper for seismic vibration suppression
Publisher: Elsevier BV
Date: 02-2019
Trajectory control for autonomous electric vehicles with in-wheel motors based on a dynamics model approach
Publisher: Institution of Engineering and Technology (IET)
Date: 06-2016
Design and testing of a novel two-way controllable overrunning clutch based magneto-rheological brake
Publisher: IOP Publishing
Date: 02-08-2019
Concept and simulation study of a novel localization method for robotic endoscopic capsules using multiple positron emission markers
Publisher: Wiley
Date: 06-06-2014
DOI: 10.1118/1.4881316
Abstract: Over the last decade, wireless capsule endoscope has been the tool of choice for noninvasive inspection of the gastrointestinal tract, especially in the small intestine. However, the latest clinical products have not been equipped with a sufficiently accurate localization system which makes it difficult to determine the location of intestinal abnormalities, and to apply follow-up interventions such as biopsy or drug delivery. In this paper, the authors present a novel localization method based on tracking three positron emission markers embedded inside an endoscopic capsule. Three spherical(22)Na markers with diameters of less than 1 mm are embedded in the cover of the capsule. Gamma ray detectors are arranged around a patient body to detect coincidence gamma rays emitted from the three markers. The position of each marker can then be estimated using the collected data by the authors' tracking algorithm which consists of four consecutive steps: a method to remove corrupted data, an initialization method, a clustering method based on the Fuzzy C-means clustering algorithm, and a failure prediction method. The tracking algorithm has been implemented inMATLAB utilizing simulation data generated from the Geant4 Application for Emission Tomography toolkit. The results show that this localization method can achieve real-time tracking with an average position error of less than 0.4 mm and an average orientation error of less than 2°. The authors conclude that this study has proven the feasibility and potential of the proposed technique in effectively determining the position and orientation of a robotic endoscopic capsule.
Development of a variable stiffness magnetorheological damper with self-powered generation capability
Publisher: SAGE Publications
Date: 21-07-2020
Abstract: This article reports a compact stiffness controllable magnetorheological d er with a self-powered capacity. First, the structure, working mechanism, and analysis of the d er are presented. After the prototype of the magnetorheological d er, experimental tests were conducted to evaluate its variable stiffness feature and self-powered generation capability using a hydraulic Instron test system. The testing results demonstrate that its stiffness variation range can reach 70.4% when the applied current increases from 0 to 2 A. The energy generating capability of the magnetorheological d er was also evaluated using the Instron testing system under a harmonic excitation with 0.15 Hz frequency and 30 mm displacement. The testing results illustrate that the self-powered generation component can generate 2.595 W effective power, which is enough to control the magnetorheological component of the d er. The successful development, theoretical analysis, and experimental testing of this new variable stiffness self-powered magnetorheological d er make the concept of energy-free variable stiffness magnetorheological d er feasible.
Broadband nonlinear behaviour of a soft magneto-sensitive elastomer cantilever under low-frequency and low-magnitude excitation
Publisher: SAGE Publications
Date: 27-06-2018
Abstract: In this article, a soft magneto-sensitive elastomer cantilever with strong nonlinear behaviour is presented. With the help of a permanent magnet, a strong nonlinear behaviour is observed under low-frequency and low-magnitude excitation, which demonstrated its potential for vibrational energy harvesting. A theoretical model is developed which incorporates the nonlinear magnetic interaction in an Euler–Bernoulli beam. The theoretical model is further discretized using finite element method, and the frequency response was obtained through numerical simulation. Frequency sweep experiment was conducted to validate the model and investigate the nonlinear behaviour of the cantilever under different excitations. With the validated model, various contributing factors were parametrically studied to investigate their influences towards the dynamic behaviour of the cantilever. The results show that magnetic force dominates the linear stiffness increase of soft magneto-sensitive elastomer cantilever rather than the magnetorheological effect, and the nonlinear performance of soft magneto-sensitive elastomer cantilever mainly derives from horizontal magnetic force variations during vibration. These properties make the soft magneto-sensitive elastomer cantilever an attractive candidate to automatically tune and broaden the operational bandwidth of vibrational energy harvesters.
Development of an MRE adaptive tuned vibration absorber with self-sensing capability
Publisher: IOP Publishing
Date: 20-08-2015
Functional Liquid Metal Nanoparticles Produced by Liquid-Based Nebulization
Publisher: Wiley
Date: 26-10-2019
Dynamics analysis of an omni-directional vehicle
Publisher: Springer Science and Business Media LLC
Date: 04-2014
Modeling and Motion Control of a Liquid Metal Droplet in a Fluidic Channel
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2020
Control of conducting polymer actuators without physical feedback: simulated feedback control approach with particle swarm optimization
Publisher: IOP Publishing
Date: 14-02-2014
A highly stiffness-adjustable robot leg for enhancing locomotive performance
Publisher: Elsevier BV
Date: 07-2019
Design and experimental study of an origami-inspired constant-force mechanism
Publisher: Elsevier BV
Date: 2023
Particle-Based Porous Materials for the Rapid and Spontaneous Diffusion of Liquid Metals
Publisher: American Chemical Society (ACS)
Date: 10-02-2020
The Viscoelastic Properties of Gallium-Indium Alloy
Publisher: Applied Rheology; ETH Zurich
Date: 2018
Analysis of jet characteristics and structural optimization of a liquamatic fire water monitor with self-swinging mechanism
Publisher: Springer Science and Business Media LLC
Date: 07-08-2012
A simple and cost-effective method for fabrication of integrated electronic-microfluidic devices using a laser-patterned PDMS layer
Publisher: Springer Science and Business Media LLC
Date: 03-12-2011
Automatic morphology control of liquid metal using a combined electrochemical and feedback control approach
Publisher: MDPI AG
Date: 26-03-2019
DOI: 10.3390/MI10030209
Abstract: Gallium-based liquid metal alloys have been attracting attention from both industry and academia as soft, deformable, reconfigurable and multifunctional materials in microfluidic, electronic and electromagnetic devices. Although various technologies have been explored to control the morphology of liquid metals, there is still a lack of methods that can achieve precise morphological control over a free-standing liquid metal droplet without the use of mechanical confinement. Electrochemical manipulation can be relatively easy to apply to liquid metals, but there is a need for techniques that can enable automatic and precise control. Here, we investigate the use of an electrochemical technique combined with a feedback control system to automatically and precisely control the morphology of a free-standing liquid metal droplet in a sodium hydroxide solution. We establish a proof-of-concept platform controlled by a microcontroller to demonstrate the reconfiguration of a liquid metal droplet to desired patterns. We expect that this method will be further developed to realize future reconfigurable liquid metal-enabled soft robots.
Continuous sorting of microparticles using dielectrophoresis
Publisher: American Scientific Publishers
Date: 04-2012
Abstract: Sorting of particles such as cells is a critical process for many biomedical applications, and it is challenging to integrate it into an analytical microdevice. We report an effective and flexible dielectrophoresis (DEP)-based microfluidic device for continuous sorting of multiple particles in a microchannel. The particle sorter is composed of two components-a DEP focusing unit and a Movable DEP Trap (MDT). The trap is formed by an array of microelectrodes at the bottom of the channel and a transparent electrode plate placed at the top. The location of the trap is dependent on the configuration of voltages on the array and therefore is addressable. Flowing particles are first directed and focused into a single particle stream by the focusing unit. The streamed particles are then sorted into different fractions using the movable trap by rapidly switching the applied voltage. The performance of the sorter is demonstrated by successfully sorting microparticles in a continuous flow. The proposed DEP-based microfluidic sorter can be implemented in applications such as s le preparation and cell sorting for subsequent analytical processing, where sorting of particles is needed.
Characterization of conducting polymer based bimorph vibration sensors
Publisher: SPIE
Date: 16-02-2005
DOI: 10.1117/12.582159
How the type of input function affects the dynamic response of conducting polymer actuators
Publisher: IOP Publishing
Date: 09-09-2014
Multi-Objective Asymmetric Sliding Mode Control of Connected Autonomous Vehicles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
An integrated dielectrophoresis-active hydrophoretic microchip for continuous particle filtration and separation
Publisher: IOP Publishing
Date: 22-07-2015
A novel magnetorheological elastomer isolator with negative changing stiffness for vibration reduction
Publisher: IOP Publishing
Date: 16-09-2014
A mini review of recent progress on vortex-induced vibrations of marine risers
Publisher: Elsevier BV
Date: 2020
Development and analysis of a variable stiffness damper using an MR bladder
Publisher: IOP Publishing
Date: 15-06-2009
An Energy Saving Variable Damping Seat Suspension System with Regeneration Capability
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2018
Viscoelastic properties of MR elastomers under harmonic loading
Publisher: Springer Science and Business Media LLC
Date: 20-03-2010
Magnetorheology of single-walled nanotube dispersions
Publisher: Elsevier BV
Date: 06-2007
Optimizing Vibration Attenuation Performance of a Magnetorheological Damper-Based Semi-active Seat Suspension Using Artificial Intelligence
Publisher: Frontiers Media SA
Date: 15-11-2019
Integrated active and semi-active control for seat suspension of a heavy duty vehicle
Publisher: SAGE Publications
Date: 10-08-2018
Abstract: In this article, an integrated active and semi-active seat suspension for heavy duty vehicles is proposed, and its prototype is built an integrated control algorithm applied measurable variables (suspension relative displacement and seat acceleration) is designed for the proposed seat prototype. In this seat prototype, an active actuator with low maximum force output (70 N), which is insufficient for an active seat suspension to control the resonance vibration, is applied together with a rotary magnetorheological d er. The magnetorheological d er can suppress the high vibration energy in resonance frequency, and then a small active force can further improve the seat suspension performance greatly. The suspension’s dynamic property is tested with a MTS system, and its model is identified based on the testing data. A modified on–off controller is applied for the rotary magnetorheological d er. A [Formula: see text] controller with the compensation of a disturbance observer is used for the active actuator. Considering the energy saving, the control strategy is designed as that only when the magnetorheological d er is in the off state (0 A current), the active actuator will have active force output, or the active actuator is off. Both simulation and experiment are implemented to verify the proposed seat suspension and controller. In the sinusoidal excitations experiment, the acceleration transmissibility of integrated control seat has lowest value in resonance frequency and frequencies above the resonance, when compared with power on (0.7 A current), power off (0 A current) and semi-active control seat. In the random vibration experiment, the root mean square acceleration of integrated control seat suspension has 47.7%, 33.1% and 26.5% reductions when compared with above-mentioned three kinds of seat suspension. The power spectral density comparison indicates that the integrated seat suspension will have good performance in practical application. The integrated active and semi-active seat suspension can fill energy consumption gap between active and semi-active control seat suspension.
Particle inertial focusing and its mechanism in a serpentine microchannel
Publisher: Springer Science and Business Media LLC
Date: 13-12-2013
Damping of magnetorheological elastomers
Publisher: AIP Publishing
Date: 12-2008
DOI: 10.1088/1674-0068/21/06/581-585
Abstract: The d ing property of magnetorheological (MR) elastomers is characterized by a modified dynamic mechanical-magnetic coupled analyzer. The influences of the external magnetic flux density, d ing of the matrix, content of iron particles, dynamic strain, and driving frequency on the d ing properties of MR elastomers were investigated experimentally. The experimental results indicate that the d ing properties of MR elastomers greatly depend on the interfacial slipping between the inner particles and the matrix. Different from general composite materials, the interfacial slipping in MR elastomers is affected by the external applied magnetic field.
Development of a new magnetorheological impact damper with low velocity sensitivity
Publisher: IOP Publishing
Date: 12-08-2022
Abstract: The velocity sensitive characteristic of the conventional linear magnetorheological (MR) d er is undesirable in the application of impact protection. It will induce large d ing forces when the d er suffers high velocity impacts, whilst comprising the energy dissipation efficiency of the d er and posing a serious threat to occupants and mechanical structures. This work reports a new MR impact d er (NMRID) with low velocity sensitivity. Unlike the conventional MR impact d er (CMRID) in which MR fluids (MRFs) flow from one chamber to the other through a small annular gap between the piston and cylinder, the NMRID has a whole annular gap between the shaft and cylinder that is filled with MRFs, and the MRFs work in a pure shear mode without any liquid flow. In this work, a NMRID and a CMRID were prototyped. The velocity sensitivities of these two impact d ers were compared via numerical analysis and experimental impact tests. The analysis and test results indicate that NMRID possesses a much lower velocity sensitivity than the CMRID the dynamic range of the NMRID decreases less than CMRID with the increase of nominal impact velocity. Then, to demonstrate the controllability of NMRID, impact tests with a bang–bang control were implemented, and the peak force of NMRID was successfully controlled around a target force under different levels of nominal impact velocity. This research proves that the designed NMRID is less sensitive to velocity than the CMRID and the NMRID has good controllability, demonstrating that the NMRID can serve as a better candidate than CMRID in applications with high impact velocity.
Takagi-sugeno fuzzy H∞ tracking control for steer-by-wire systems
Publisher: IEEE
Date: 09-2015
Development of a novel magnetophoresis-assisted hydrophoresis microdevice for rapid particle ordering
Publisher: Springer Science and Business Media LLC
Date: 11-06-2016
DOI: 10.1007/S10544-016-0078-7
Abstract: Focusing and ordering of micro- or nanoparticles is an essential ability in microfluidic platforms for bio-s le processing. Hydrophoresis is an effective method utilising hydrodynamic force to focus microparticles, but it is limited by the fixed operational range and the lack of flexibility. Here, we report a work to tune and improve the dynamic range of hydrophoresis device using magnetophoresis. In this work, a novel approach was presented to fabricate the lateral fluidic ports, which allow the flipped chip to remain stable on the stage of microscope. Diamagnetic polystyrene microparticles suspended in a ferrofluidic medium were repelled to the lower level of the channel by negative magnetophoretic force, and then interact with grooves of microchannel to obtain an excellent hydrophoretic ordering. The effects of (i) flow rate, (ii) particle size, (iii) magnetic susceptibility of the medium, and (iv) number of magnets on the particle focusing efficiency were also reported. As the proposed magnetophorsis-assisted hydrophoretic device is tuneable and simple, it holds great potential to be integrated with other microfluidic components to form an integrated s le-to-answer system.
Experimental and modeling approaches of MR behaviors under large step strains
Publisher: Elsevier BV
Date: 2003
Enhanced particle self-ordering in a double-layer channel
Publisher: Springer Science and Business Media LLC
Date: 23-02-2018
DOI: 10.1007/S10544-018-0269-5
Abstract: In this work, a novel double-layer microfluidic device for enhancing particle focusing was presented. The double-layer device consists of a channel with expansion-contraction array and periodical slanted grooves. The secondary flows induced by the grooves modulate the flow patterns in the expansion-contraction-array (ECA) channel, further affecting the particle migration. Compared with the single ECA channel, the double-layer channel can focus the particles over a wider range of flow rate. Due to the differentiation of lateral migration, the double-layer channel is able to distinguish the particles with different sizes. Furthermore, the equilibrium positions could be modulated by the orientation of grooves. This work demonstrates the possibility to enhance and adjust the inertial focusing in an ECA channel with the assistance of grooves, which may provide a simple and portable platform for downstream filtration, separation, and detection.
Magneto-induced surface morphologies in magnetorheological elastomer films: an analytical study
Publisher: IOP Publishing
Date: 20-03-2019
Development of a linear damper working with magnetorheological shear thickening fluids
Publisher: SAGE Publications
Date: 19-03-2015
Abstract: Magnetorheological shear thickening fluid is a smart material that exhibits both magnetorheological and shear thickening effects. This study focuses on the design and development of a novel magnetorheological shear thickening fluid–based linear d er. First, micron-sized carbonyl iron particles, at a 20% and 80% weight fraction, were immersed among the shear thickening fluid base and thoroughly mixed under a high shear condition to produce the magnetorheological shear thickening fluid. Then, a monotube d er with a bypass was designed and fabricated. The testing results using an MTS machine show that the influence of incorporating shear thickening fluid allows the 20% magnetorheological shear thickening fluid–filled d er to work in different dynamic loading velocities with the stiffness and d ing changed, while, simultaneously, the dynamics of the d er depend on the variations in the magnetic field. The measured responses of the 20% magnetorheological shear thickening fluid–filled d er prove that the d ers have both the MR effect and shear thickening effect. In contrast, the 80% magnetorheological shear thickening fluid–filled d er behaves more like a conventional magnetorheological fluid–filled d er because its shear thickening effect is restrained and the MR effect becomes more obvious with higher iron volume.
A Structural Optimisation Method for a Soft Pneumatic Actuator
Publisher: MDPI AG
Date: 06-2018
High-throughput, sheathless, magnetophoretic separation of magnetic and non-magnetic particles with a groove-based channel
Publisher: AIP Publishing
Date: 21-11-2016
DOI: 10.1063/1.4968835
Abstract: The separation of target objects conjugated with magnetic particles is a significant application in biomedicine and clinical diagnosis. Conventional magnetophoresis-based devices use a sheath flow to pre-focus the particles into a single stream and typically operate at a low flow rate. We demonstrate in this work a high-throughput, sheathless, magnetophoretic separation of magnetic and non-magnetic beads in a groove-based channel, and also report on an interesting phenomenon where the same magnetic beads in the same microchannel, but with different setups, has a different particle tracing a binary mixture of magnetic and non-magnetic beads in a diluted ferrofluid, is then fed into the channel. These magnetic beads are focused near the centreline of the channel by exploiting positive magnetophoresis and microvortices generated by grooves, whereas the non-magnetic beads are focused along the sidewalls of the channel by negative magnetophoresis and hydrophoresis. These magnetic and non-magnetic beads are separated in a wide range of flow rates (up to 80 μl min−1).
Multiplexing slanted spiral microchannels for ultra-fast blood plasma separation
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6LC00713A
Abstract: Blood and blood products are critical components of health care.
Development of a novel variable stiffness and damping magnetorheological fluid damper
Publisher: IOP Publishing
Date: 15-07-2015
Development of an ankle physiotherapy device using an MR damper
Publisher: Springer Science and Business Media LLC
Date: 16-06-2004
Multi-objective robust optimization design for powertrain mount system of electric vehicles
Publisher: SAGE Publications
Date: 10-07-2017
Abstract: A multi-objective robust optimization scheme for the powertrain mount system of an electric vehicle is proposed in this paper. A permanent magnet synchronous motor model is established by taking account of the effects of magnetic saturation and space harmonics, in which the d–q-axis inductance and the flux linkage excited by permanent magnet were obtained by finite element method. The rippled output torque of the permanent magnet synchronous motor mixed with harmonic components is obtained with the New European Driving Cycle as the running condition of the electric vehicle. A six degree-of-freedoms (DOFs) powertrain mount system is established and the response of the system is obtained with the rippled torque as the excitation input. A multi-objective optimization model of the powertrain mount system is built with the stiffness’s of the mounts as the design variables, and with the goal of maximizing the decoupling rates and minimizing the dynamic reaction forces of the mounts acting on the car body. Genetic algorithm is used to conduct the global optimization and all the Pareto optimal solutions are found out based on the optimization theory, and the solution with the optimal robustness of dynamic reaction force is obtained by Latin hypercube s ling method. The results show that with the proposed multi-objective robust optimization scheme applied for the parameters optimization of the motor mount system, the decoupling rates increase obviously, the dynamic reaction force decreases apparently, and the optimization result shows good robustness. The optimization results can make the powertrain mount system of electric vehicles processing of optimal dynamic response characteristics correspondingly.
Hysteretic Model of a Rotary Magnetorheological Damper in Helical Flow Mode
Publisher: Springer Singapore
Date: 2018
A new robotic tactile sensor with bio-mimetic structural colour inspired by Morpho butterflies
Publisher: IOP Publishing
Date: 16-08-2019
Abstract: Since tactile perception and robotic manipulation play important roles in human survival, we propose a new method for developing robotic tactile sensors based on the structural colours of Morpho menelaus (a kind of Morpho butterfly). The first task is to fabricate a flexible bioinspired grating with a similar microstructure to the wings of Morpho menelaus using the transfer technique, onto the surfaces of polydimethylsiloxane (PDMS) films. The second task, depending on the angle of diffracted light, is to integrate the flexible diffraction grating with a polychromatic light source and a CCD camera, and then predict the position and magnitude of the contact force caused by a change in the diffraction pattern. The final task is to set up an experimental calibration platform and a marker point array with an interval of 1 mm for an image processing algorithm and a deep learning method to establish the relationship between the contact point position, and the magnitude of the force and diffraction pattern. The results showed that this tactile sensor has high sensitivity and resolution, with the position of the contact force of 1 mm. This practical application of the UR-5 manipulator verifies the feasibility of the prototype as a tactile sensor. This tactile sensing method may be widely used in robotics by miniaturising the design.
Model-based Takagi-Sugeno fuzzy approach for vehicle longitudinal velocity estimation during braking
Publisher: IEEE
Date: 07-2014
Design and experimental evaluation of a new modular underactuated multi-fingered robot hand
Publisher: SAGE Publications
Date: 08-04-2020
Abstract: In this paper, a modular underactuated multi-fingered robot hand is proposed. The robot hand can be freely configured with different number and configuration of modular fingers according to the work needs. Driving motion is achieved by the rigid structure of the screw and the connecting rod. A finger-connecting mechanism is designed on the palm of the robot hand to meet the needs of modular finger’s installation, drive, rotation, and sensor connections. The fingertips are made of hollow rubber to enhance the stability of grasping. Details about the design of the robot hand and analysis of the robot kinematics and grasping process are described. Last, a prototype is developed, and a grab test is carried out. Experimental results demonstrate that the structure of proposed modular robot hand is reasonable, which enables the adaptability and flexibility of the modular robot hand to meet the requirements of various grasping modes in practice.
Negative Pressure Induced Droplet Generation in a Microfluidic Flow-Focusing Device
Publisher: American Chemical Society (ACS)
Date: 16-02-2017
DOI: 10.1021/ACS.ANALCHEM.6B05053
Abstract: We introduce an effective method to actively induce droplet generation using negative pressure. Droplets can be generated on demand using a series of periodic negative pressure pulses. Fluidic network models were developed using the analogy to electric networks to relate the pressure conditions for different flow regimes. Experimental results show that the droplet volume is correlated to the pressure ratio with a power law of 1.3. Using a pulsed negative pressure at the outlet, we are able to produce droplets in demand and with a volume proportional to the pulse width.
Measurement and prediction of granite damage evolution in deep mine seams using acoustic emission
Publisher: IOP Publishing
Date: 03-09-2019
Abstract: With unceasing increase of mining depth and development intensity, mining disasters such as rock burst have been increasing frequently, which often result in catastrophic accidents. Therefore, it is imperative to accurately forecast underground disasters. Previous research has suggested that the combination of drill-hole pressure relief and acoustic emission (AE) monitoring serves as an effective measure method towards the forecasting and prevention of disastrous accidents. However, the AE evolution mechanism of underground rock damages remains a challenge more specifically, the relationships among the drilling hole positions, depths and diameters, and the stress–strain and AE characteristics of the rocks are discussed little in the literature. In order to bridge this research gap, the particle flow code (PFC2D) is employed to systemically investigate the hidden patterns among the mechanical properties, AE and damage evolution of the rock mass with different positions, depths and diameters of the drilling holes. Analysis results demonstrate that the drilling position influences the rock stress–strain and AE characteristics in the plastic deformation stage and the residual stage while the hole depth affects the drilling process. More specifically, the initial AE strength, AE impact at the peak moment, AE fluctuations and induction time are significantly influenced by the drilling position and depth. Furthermore, the drilling position and depth change the evolution law in the damage acceleration and stable development stages, while the hole diameter has little effect on the AE signal during the rock drilling process.
Dielectrophoretic manipulation and separation of particles in an S-shaped microchannel with hurdles
Publisher: IEEE
Date: 07-2013
Active control of an innovative seat suspension system with acceleration measurement based friction estimation
Publisher: Elsevier BV
Date: 12-2016
Experimental study and modeling of a novel magnetorheological elastomer isolator
Publisher: IOP Publishing
Date: 02-10-2013
Development and characterization of a magnetorheological elastomer based adaptive seismic isolator
Publisher: IOP Publishing
Date: 31-01-2013
A 3-D Microelectrode System for Dielectrophoretic Manipulation of Microparticles
Publisher: IOP Publishing
Date: 04-2006
Decoupled Semiactive Vibration Control of Electrically Interconnected Suspension Based on Disturbance Compensation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
High-throughput production of uniformly sized liquid metal microdroplets using submerged electrodispersion
Publisher: AIP Publishing
Date: 15-04-2019
DOI: 10.1063/1.5086376
Abstract: Microdroplets of gallium-based liquid metal alloys have enabled various applications in the fields of biomedicine, electronics, and chemistry. However, due to the high surface tension of liquid metal, high-throughput production of uniformly sized liquid metal microdroplets is challenging using conventional acoustic or microfluidic methods. Here, adapting the submerged electrodispersion technique that has conventionally been used for generating water-based microdroplets, we develop a simple and straightforward platform for the high-throughput production of near-monodisperse (coefficient of variation less than 5%) liquid metal microdroplets in oil without using microfluidic devices. We demonstrate the capabilities of this method for producing liquid metal microdroplets (diameters ranging from tens to hundreds of micrometers) and introduce a spinning disk to induce a flow of oil phase for preventing the coalescence of the microdroplets. The simplicity and remarkable abilities demonstrated for this method may pave the path for the development of future innovative applications based on liquid metal microdroplets.
Top sheath flow-assisted secondary flow particle manipulation in microchannels with the slanted groove structure
Publisher: Springer Science and Business Media LLC
Date: 19-12-2019
Real-time adaptive leg-stiffness for roll compensation via magnetorheological control in a legged robot
Publisher: IOP Publishing
Date: 21-02-2022
Abstract: Over the recent few decades, the evolving research-field of legged robotics has seen various mechanical and control-based developments. Inspired by biological species, a significant adaptation in modern mechanical leg designs has been the implementation of adjustable stiffness, shifting from what were previously simple linkages to more-complex variable stiffness actuators. Physiological studies previously demonstrated leg-stiffness modulation was not only a common trait in multiple biological locomotors, but also played a key role in disturbance recovery for humans. Guided by this, recent robotics research has shown that this can also be applied to legged robots to achieve similar locomotion adaptations, albeit often limited by the tuning time of leg stiffness in such circumstances. This study proposes real-time adaptive stiffness robot legs which are governed by fast-response magnetorheological fluid d ers, enabling stiffness adjustment upon a single step. Through experimental characterisation and model validation, these legs are shown to achieve a maximum stiffness shift of 114%. Enabled by real-time control during locomotion, improved performance and roll-angle stability is experimentally demonstrated for a bipedal robot test platform. Such improvement to locomotion is found through typical legged locomotion scenarios, with the platform encountering: obstacles, valleys, and coronal gradients in a comprehensive series of experiments.
Development of a novel multi-layer MRE isolator for suppression of building vibrations under seismic events
Publisher: Elsevier BV
Date: 03-2016
Development of a magnetorheological elastomer rubber joint with fail-safe characteristics for high-speed trains
Publisher: IOP Publishing
Date: 24-02-2022
Abstract: The stiffness of the train’s rubber joint at the primary suspension system has a crucial influence on the operation stability and curve-passing performance. As traditional rubber joint only provides unadjustable parameters, they cannot meet the conflicting stiffness requirements when the train is running at high speed on straight track and passing through the curve track. To solve this problem, this paper proposed a new rubber joint with fail-safe characteristics based on magnetorheological elastomer (MRE). The joint stiffness is controlled by a hybrid magnetic field generated by permanent magnets and electromagnets. With this hybrid magnetic field, the initial stiffness of the MRE joint can be designed to be hard so as to suppress the hunting motions and vibrations of wheelsets and thus keep the trains’ high-speed stability furthermore, the stiffness can decrease by energizing the electromagnets when passing through a curve track. With this characteristic, the joint can guarantee the safety of the train at high operation speed even when the joint control system fails. The prototype of the MRE joint was fabricated and assembled. Stiffness controllability of the MRE joint was tested using a Material Testing Systems machine. The result reveals that the stiffness of this MRE joint can be controlled effectively. According to the testing results, a new phenomenological model was built to predict the joint’s dynamic performance. Then this established model was integrated into dynamic models of trains to numerically evaluate the new joint’s influence on the train’s stability and trafficability. The evaluation result shows that the proposed MRE joint is fully effective on providing controllable stiffness to satisfy the conflicting stiffness requirement with fail-safe characteristics.
A state-of-the-art review on magnetorheological elastomer devices
Publisher: IOP Publishing
Date: 11-11-2014
A rapid, maskless 3D prototyping for fabrication of capillary circuits
Publisher: Wiley
Date: 22-01-2018
Abstract: Proteinuria is an established risk marker for progressive renal function loss and patients would significantly benefit from a point-of-care testing. Although extensive work has been done to develop the microfluidic devices for the detection of urinary protein, they need the complicated operation and bulky peripherals. Here, we present a rapid, maskless 3D prototyping for fabrication of capillary fluidic circuits using laser engraving. The capillary circuits can be fabricated in a short amount of time (<10 min) without the requirements of clean-room facilities and photomasks. The advanced capillary components (e.g., trigger valves, retention valves and retention bursting valves) were fabricated, enabling the sequential liquid delivery and s le-reagent mixing. With the integration of smartphone-based detection platform, the microfluidic device can quantify the urinary protein via a colorimetric analysis. By eliminating the bulky and expensive equipment, this smartphone-based detection platform is portable for on-site quantitative detection.
Tunable Particle Focusing in a Straight Channel with Symmetric Semicircle Obstacle Arrays Using Electrophoresis-Modified Inertial Effects
Publisher: MDPI AG
Date: 11-2016
DOI: 10.3390/MI7110195
Innovative variable stiffness and variable damping magnetorheological actuation system for robotic arm positioning
Publisher: SAGE Publications
Date: 24-05-2022
DOI: 10.1177/1045389X221099453
Abstract: Overshoot and long settling time are two common problems of the positioning control for robotic arms. To solve the positioning control problems, an innovative variable stiffness and variable d ing (VSVD) magnetorheological (MR) actuation system for robotic arms was designed, prototyped and evaluated in this paper. The system can reduce the overshoot and settling time of the robotic arm with less energy consumption by controlling the stiffness and d ing of its VSVD unit. A robotic arm with the VSVD actuation system was developed and prototyped. In order to evaluate the performance of the system, a step route and a customised route were designed for the robotic arm system to trace. Under these two routes, the positioning control performances of the VSVD robotic arm were evaluated numerically and experimentally with the control modes of uncontrolled, VD, VS and VSVD, respectively. Both the numerical and experimental results demonstrated that the VSVD control mode works best in general with less overshoot, settling time and energy consumption, indicating that the proposed VSVD actuation system can serve as a good candidate to solve the positioning control problems of robotic arms.
Analytical jump-avoidance criteria of Duffing-type vibration isolation systems under base and force excitations based on concave-convex property
Publisher: SAGE Publications
Date: 27-06-2023
DOI: 10.1177/10775463221110653
Abstract: As a representative nonlinear system, Duffing oscillator has wide applications in the field of vibration control. This paper concentrates on the analytical jump criteria problem for a class of Duffing systems based on the concave-convex property. The mechanical model of Duffing-type isolators subjected to various excitations is firstly presented. The defined single critical jump point (SCJP) is proved to be an inflection point based on the concave-convex property of the dynamic response. Moreover, the analytical jump-avoidance criteria under base and force excitations are established. The sensitivities of dynamic parameters are discussed in detail, and several jump characteristics are revealed and explained. It turned out that the SCJP is inherent for Duffing systems. The key advantage is that the proposed jump-avoidance scheme can be used directly and independent of the solved dynamic response. In other words, this scheme provides a pure algebraic method for determining jumps and an accurate range of the adjustable parameters for practical applications. A series of numerical simulations and comparisons are conducted to demonstrate the effectiveness of the proposed analytical judgment method.
Visualizing rheological mechanism of magnetorheological fluids
Publisher: IOP Publishing
Date: 12-01-2022
Abstract: In order to study the rheological properties of aqueous magnetorheological fluids (MRFs) from microscopic point of view, an experimental observation method based on fluorescence confocal laser scanning microscope is proposed to clearly shown the chain shape of magnetic particles. Firstly, the mathematical model of the magnetic particles is established in a magnetic field using the magnetic dipole theory, and the MRFs with different volume fraction and different magnetic fields are investigated. Furthermore, an aqueous MRFs experiment is prepared, in which the magnetic particles are combined with Alexa 488 fluorescent probe. On this basis, an observation method is innovatively developed using two-dimensional and three-dimensional image analysis by the fluorescence confocal microscope. The rheological mechanism of the aqueous MRFs is investigated using four different types of MRFs in an external magnetic field. The analysis results demonstrate that the simulation and experimental rheological properties of the MRFs are consistent with the magnetic dipole theory. Moreover, the proposed method is able to real-time observe the rheological process of the MRFs with a very high resolution, which ensures the correctness of the analysis result of the rheological mechanism.
Control of conducting polymer actuators without feedback: Simulated feedback control approach
Publisher: IEEE
Date: 07-2013
Microstructures and viscoelastic properties of anisotropic magnetorheological elastomers
Publisher: IOP Publishing
Date: 06-11-2007
Design, analysis, prototyping, and experimental evaluation of an efficient double coil magnetorheological valve
Publisher: SAGE Publications
Date: 2014
DOI: 10.1155/2014/403410
Abstract: A double coil magnetorheological (MR) valve with an outer annular resistance gap was designed and prototyped. The finite element modeling and analysis of double coil MR valve were carried out using ANSYS/Emag software, and the optimal magnetic field distribution and magnetic flux density of the double coil MR valve were achieved. The mechanism of the pressure drop was studied by building a mathematical model of pressure drop in the double coil MR valve. The proposed double coil MR valve was prototyped and its performance was experimentally evaluated. The new MR valve design has improved the efficiency of double coil MR valve significantly.
Smart Multifunctional Fluids for Lithium Ion Batteries: Enhanced Rate Performance and Intrinsic Mechanical Protection
Publisher: Springer Science and Business Media LLC
Date: 21-08-2013
DOI: 10.1038/SREP02485
A review of heat and mass transfer improvement techniques for dehumidifiers and regenerators of liquid desiccant cooling systems
Publisher: Elsevier BV
Date: 11-2019
Versatile Microfluidic Platforms Enabled by Novel Magnetorheological Elastomer Microactuators
Publisher: Wiley
Date: 19-12-2018
Design, Fabrication, and Testing of a Novel Ferrofluid Soft Capsule Robot
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2022
Development of magnetorheological elastomers–based tuned mass damper for building protection from seismic events
Publisher: SAGE Publications
Date: 05-02-2018
Editorial for the special issue on the insights and advancements in microfluidics
Publisher: MDPI AG
Date: 17-08-2017
DOI: 10.3390/MI8080254
On-Chip Microparticle and Cell Washing Using Coflow of Viscoelastic Fluid and Newtonian Fluid
Publisher: American Chemical Society (ACS)
Date: 17-08-2017
DOI: 10.1021/ACS.ANALCHEM.7B02671
Abstract: This work investigates the on-chip washing process of microparticles and cells using coflow configuration of viscoelastic fluid and Newtonian fluid in a straight microchannel. By adding a small amount of biocompatible polymers into the particle medium or cell culture medium, the induced viscoelasticity can push particles and cells laterally from their original medium to the coflow Newtonian medium. This behavior can be used for particle or cell washing. First, we demonstrated on-chip particle washing by the size-dependent migration speed using coflow of viscoelastic fluid and Newtonian fluid. The critical particle size for efficient particle washing was determined. Second, we demonstrated continuous on-chip washing of Jurkat cells using coflow of viscoelastic fluid and Newtonian fluid. The lateral migration process of Jurkat cells along the channel length was investigated. In addition, the cell washing quality was verified by hemocytometry and flow cytometry with a recovery rate as high as 92.8%. Scanning spectrophotometric measurements of the media from the two inlets and the two outlets demonstrated that diffusion of the coflow was negligible, indicating efficient cell washing from culture medium to phosphate-buffered saline medium. This technique may be a safer, simpler, cheaper, and more efficient alternative to the tedious conventional centrifugation methods and may open up a wide range of biomedical applications.
Dynamic response of shear thickening fluid reinforced with SiC nanowires under high strain rates
Publisher: AIP Publishing
Date: 17-07-2017
DOI: 10.1063/1.4994066
Abstract: In this letter, SiC nanowires were adopted to reinforce the nanoparticle-based shear thickening fluid (STF) to improve its rheological properties. The reinforced STF showed a significant increase in viscosity. A Split-Hopkinson pressure bar was implemented to evaluate the dynamic response of STF at strain rates in the range of 3 × 103–1.2 × 104/s. For the pure STF, the flow stress reaches a saturation value with increasing strain rates and shows almost no strain rate sensitivity, whereas the flow stress of the reinforced STF increases with strain rates, and the strain rate sensitivity to flow stress is obvious owing to the resistance of nanowires. The essence of this study is to reveal that there is a limiting value of the flow stress of traditional nanoparticle-based STF at high strain rates due to the lubrication force among particles. SiC nanowires can be used to break this limitation of the nanoparticle-based STF.
On a CPG-Based Hexapod Robot: AmphiHex-II With Variable Stiffness Legs
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2018
A review on performance enhancement techniques for ambient vibration energy harvesters
Publisher: Elsevier BV
Date: 05-2017
High throughput extraction of plasma using a secondary flow-aided inertial microfluidic device
Publisher: Royal Society of Chemistry (RSC)
Date: 18-07-2014
DOI: 10.1039/C4RA06513A
A hybrid dielectrophoretic and hydrophoretic microchip for particle sorting using integrated prefocusing and sorting steps
Publisher: Wiley
Date: 18-12-2014
Abstract: This work explores dielectrophoresis (DEP)-active hydrophoresis in sorting particles and cells. The device consists of prefocusing region and sorting region with great potential to be integrated into advanced lab-on-a-chip bioanalysis devices. Particles or cells can be focused in the prefocusing region and then sorted in the sorting region. The DEP-active hydrophoretic sorting is not only based on size but also on dielectric properties of the particles or cells of interest without any labelling. A mixture of 3 and 10 μm particles were sorted and collected from corresponding outlets with high separation efficiency. According to the different dielectric properties of viable and nonviable Chinese Hamster Ovary (CHO) cells at the medium conductivity of 0.03 S/m, the viable CHO cells were focused well and sorted from cell s le with a high purity.
A review of heat and mass transfer mechanisms of dehumidifiers and regenerators for liquid desiccant cooling systems
Publisher: Informa UK Limited
Date: 07-11-2019
High Throughput Cell-Free Extraction of Plasma by an Integrated Microfluidic Device Combining Inertial Focusing and Membrane
Publisher: ASME International
Date: 23-02-2017
DOI: 10.1115/1.4035588
Abstract: Plasma is a host of numerous analytes such as proteins, metabolites, circulating nucleic acids (CNAs), and pathogens, and it contains massive information about the functioning of the whole body, which is of great importance for the clinical diagnosis. Plasma needs to be completely cell-free for effective detection of these analytes. The key process of plasma extraction is to eliminate the contamination from blood cells. Centrifugation, a golden standard method for blood separation, is generally lab-intensive, time consuming, and even dangerous to some extent, and needs to be operated by well-trained staffs. Membrane filtration can filter cells very effectively according to its pore size, but it is prone to clogging by dense particle concentration and suffers from limited capacity of filtration. Frequent rinse is lab-intensive and undesirable. In this work, we proposed and fabricated an integrated microfluidic device that combined particle inertial focusing and membrane filter for high efficient blood plasma separation. The integrated microfluidic device was evaluated by the diluted (×1/10, ×1/20) whole blood, and the quality of the extracted blood plasma was measured and compared with that from the standard centrifugation. We found that the quality of the extracted blood plasma from the proposed device can be equivalent to that from the standard centrifugation. This study demonstrates a significant progress toward the practical application of inertial microfluidics with membrane filter for high-throughput and highly efficient blood plasma extraction.
Modeling and Motion Control of a Soft SMA Planar Actuator
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2022
A study of the magnetorheological effect of bimodal particle based magnetorheological elastomers
Publisher: IOP Publishing
Date: 22-01-2010
A seat suspension with a rotary magnetorheological damper for heavy duty vehicles
Publisher: IOP Publishing
Date: 23-09-2016
A highly adaptive magnetorheological fluid robotic leg for efficient terrestrial locomotion
Publisher: IOP Publishing
Date: 09-08-2016
A Pan-Cancer Analysis Reveals High-Frequency Genetic Alterations in Mediators of Signaling by the TGF-β Superfamily
Publisher: Elsevier BV
Date: 10-2018
A Potential Field Approach-Based Trajectory Control for Autonomous Electric Vehicles With In-Wheel Motors
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2017
Design of a Single-Layer Microchannel for Continuous Sheathless Single-Stream Particle Inertial Focusing.
Publisher: American Chemical Society (ACS)
Date: 17-01-2018
DOI: 10.1021/ACS.ANALCHEM.7B03756
Abstract: High-throughput, high-precision single-stream focusing of microparticles has a potentially wide range of applications in biochemical analysis and clinical diagnosis. In this work, we develop a sheathless three-dimensional (3D) particle-focusing method in a single-layer microchannel. This novel microchannel consists of periodic high-aspect-ratio curved channels and straight channels. The proposed method takes advantage of both the curved channels, which induce Dean flow to promote particle migration, and straight channels, which suppress the remaining stirring effects of Dean flow to stabilize the achieved particle focusing. The 3D particle focusing is demonstrated experimentally, and the mechanism is analyzed theoretically. The effects of flow rate, particle size, and cycle number on the focusing performance were also investigated. The experimental results demonstrate that polystyrene particles with diameters of 5-20 μm can be focused into a 3D single file within seven channel cycles, with the focusing accuracy up to 98.5% and focusing rate up to 98.97%. The focusing throughput could reach up to ∼10
Effect of temperature on the transmission characteristics of high-torque magnetorheological brakes
Publisher: IOP Publishing
Date: 24-04-2019
Inertial focusing in a straight channel with asymmetrical expansion–contraction cavity arrays using two secondary flows
Publisher: IOP Publishing
Date: 24-07-2013
On-chip high-throughput manipulation of particles in a dielectrophoresis-active hydrophoretic focuser
Publisher: Springer Science and Business Media LLC
Date: 27-05-2014
DOI: 10.1038/SREP05060
Design and modeling analysis of a changeable stiffness robotic leg working with magnetorheological technology
Publisher: SAGE Publications
Date: 12-09-2018
Abstract: Since animals can adjust the stiffness of their bodies and/or appendages to adapt to changing environments and internal states and tasks, a robotic leg with changeable stiffness would be of assistance in developing mobile terrestrial robots. In this article, we present an improved model of a robotic leg that can alter its stiffness in real time by changing the characteristics of magnetorheological fluid. This particular robotic leg has a changeable stiffness module, which consists of a rotating magnetorheological fluid d er, a torsional spring, and a linear spring. The rotary magnetorheological fluid d er is used to control the deformation of a torsional spring, which alters the stiffness of the leg. To describe the mechanical features of the leg, a simplified mechanical model was built and then various experiments were carried out to verify the changeable stiffness characteristics. The simulation experiments of dual-leg locomotion were carried out to investigate the locomotive performance, including walking speed, maximum torque of motor, height variants, and mechanical cost of transport. These results demonstrate the adaptability and advantages of this changeable stiffness robotic leg and also indicated that developing a terrestrial robot which can adapt to various complex environments and tasks would be a worthwhile exercise.
A Novel Fuzzy Sliding-Mode Control for Discrete-Time Uncertain System
Publisher: Hindawi Limited
Date: 2016
DOI: 10.1155/2016/1530760
Abstract: This paper considers the sliding-mode control problem for discrete-time uncertain systems. It begins by presenting a discrete variable speed reaching law and a discrete-time sliding-mode controller (DSMC) designed using the proposed reaching law, followed by an analysis of their stability and dynamic performance. A sliding-mode controller with simple fuzzy logic is then proposed to further strengthen the dynamic performance of the proposed sliding-mode controller. Finally, the presented DSMC and the DSMC with fuzzy control for adjusting the parameters in this paper are compared with one of the previous proposed classic DSMC systems. The results of this simulation show that the DSMC presented here can suppress chatter and ensure good dynamic performances when fuzzy logic is used to tune the parameters.
Horizontal vibration reduction of a seat suspension using negative changing stiffness magnetorheological elastomer isolators
Publisher: Inderscience Publishers
Date: 2015
Vibration control of an energy regenerative seat suspension with variable external resistance
Publisher: Elsevier BV
Date: 06-2018
Soft Sensing Applications for Non-Stable Processes Based on a Weighted High-Order Dynamic Information Structure
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Dynamic Temperature Control System for the Optimized Production of Liquid Metal Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 17-06-2020
Discrete Multi-Objective Switching Topology Sliding Mode Control of Connected Autonomous Vehicles With Packet Loss
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2023
Design and Experimental Evaluation of a Magnetorheological Brake
Publisher: Springer Science and Business Media LLC
Date: 05-2003
A novel viscoelastic-based ferrofluid for continuous sheathless microfluidic separation of nonmagnetic microparticles
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6LC01007E
Abstract: We proposed and developed a novel viscoelastic ferrofluid, and demonstrated its superior advantages for continuous sheathless separation of nonmagnetic particles.
A Novel electrical variable stiffness device for vehicle seat suspension control with mismatched disturbance compensation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2019
Microstructure and magnetorheological properties of the thermoplastic magnetorheological elastomer composites containing modified carbonyl iron particles and poly(styrene-b-ethylene-ethylenepropylene-b-styrene) matrix
Publisher: IOP Publishing
Date: 23-10-2012
Nonlinear dynamics of a parametrically excited beam with a central magneto-rheological elastomer patch: An experimental investigation
Publisher: Elsevier BV
Date: 02-2016
The rheological properties of shear thickening fluid reinforced with SiC nanowires
Publisher: Elsevier BV
Date: 2017
Rapid, one-step preparation of SERS substrate in microfluidic channel for detection of molecules and heavy metal ions
Publisher: Elsevier BV
Date: 09-2019
DOI: 10.1016/J.SAA.2019.05.018
Abstract: On-chip fabrication of surface-enhanced Raman spectroscopy (SERS)-active materials enables continuous, real-time sensing of targets in the microfluidic chip. However, the current techniques require the time-consuming, complicated process and costly, bulky facilities. In this work, we present a novel method for synthesis of Ag nanostructures in a microfluidic channel via one-step electroless galvanic replacement reaction. The whole reaction could be achieved <10 mins, while the traditional methods take hours. The microfluidic channel has a Cu base, which can reduce Ag ions to Ag nanoparticles in the presence of AgNO
Time Delay Error Online Correction of LiDAR-IMU System Through MSCKF Integrated DLRNN Method
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Analysis of hydrodynamic mechanism on particles focusing in micro-channel flows
Publisher: MDPI AG
Date: 22-06-2017
DOI: 10.3390/MI8070197
Co3 O4 nanorods decorated reduced graphene oxide composite for oxygen reduction reaction in alkaline electrolyte
Publisher: Elsevier BV
Date: 09-2013
Phononic crystal lens with an asymmetric scatterer
Publisher: IOP Publishing
Date: 31-10-2018
High-Throughput Separation of White Blood Cells From Whole Blood Using Inertial Microfluidics
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2017
Continuous manipulation and separation of particles using combined obstacle‐ and curvature‐induced direct current dielectrophoresis
Publisher: Wiley
Date: 11-03-2013
Abstract: This paper presents a novel dielectrophoresis-based microfluidic device incorporating round hurdles within an S-shaped microchannel for continuous manipulation and separation of microparticles. Local nonuniform electric fields are generated due to the combined effects of obstacle and curvature, which in turn induce negative dielectrophoresis forces exerting on the particle that transport throughout the microchannel electrokinetically. Experiments were conducted to demonstrate the controlled trajectories of fix-sized (i.e. 10 or 15 μm) polystyrene particles, and size-dependent separation of 10 and 15 μm particles by adjusting the applied voltages at the inlet and outlets. Numerical simulations were also performed to predict the particle trajectories, which showed reasonable agreement with experimentally observed results. Compared to other microchannel designs that make use of either obstacle or curvature in idually for inhomogeneous electric fields, the developed microchannel offers advantages such as improved controllability of particle motion, lower requirement of applied voltage, reduced fouling, and particle adhesion, etc.
Unconventional locomotion of liquid metal droplets driven by magnetic fields
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8SM01281D
Abstract: We report an innovative method for controlling the locomotion of liquid metal droplets using Lorentz force induced by a magnetic field.
Viscoelastic properties of MR fluids
Publisher: IOP Publishing
Date: 08-1999
Rotation of Liquid Metal Droplets Solely Driven by the Action of Magnetic Fields
Publisher: MDPI AG
Date: 04-04-2019
DOI: 10.3390/APP9071421
Abstract: The self-rotation of liquid metal droplets (LMDs) has garnered potential for numerous applications, such as chip cooling, fluid mixture, and robotics. However, the controllable self-rotation of LMDs utilizing magnetic fields is still underexplored. Here, we report a novel method to induce self-rotation of LMDs solely utilizing a rotating magnetic field. This is achieved by rotating a pair of permanent magnets around a LMD located at the magnetic field center. The LMD experiences Lorenz force generated by the relative motion between the droplet and the permanent magnets and can be rotated. Remarkably, unlike the actuation induced by electrochemistry, the rotational motion of the droplet induced by magnetic fields avoids the generation of gas bubbles and behaves smoothly and steadily. We investigate the main parameters that affect the self-rotational behaviors of LMDs and validate the theory of this approach. We further demonstrate the ability of accelerating cooling and a mixer enabled by the self-rotation of a LMD. We believe that the presented technique can be conveniently adapted by other systems after necessary modifications and enables new progress in microfluidics, microelectromechanical (MEMS) applications, and micro robotics.
Multiple Natural Features Fusion for On-Site Calibration of LiDAR Boresight Angle Misalignment
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
A Novel Method for Side Slip Angle Estimation of Omni-Directional Vehicles
Publisher: SAE International
Date: 04-2014
DOI: 10.4271/2014-01-0303
Tunable smart digital structure (SDS) to modularly assemble soft actuators with layered adhesive bonding
Publisher: IOP Publishing
Date: 04-12-2017
Experimental study and modeling of rubber joints for railway vehicles using magnetorheological shear stiffening elastomers
Publisher: IOP Publishing
Date: 21-08-2020
Abstract: With the rapid development of transportation industry, advanced rail vehicle technology receives more attention than ever. The stiffness of the train’s rubber joint at the primary suspension system has a crucial influence on the operation stability and curve-passing performance. When the train is running on straight track at high speed, a high primary longitudinal stiffness in bogie design is required, whereas running on the curve track calls for a soft primary longitudinal stiffness. To solve this critical problem, a new rubber joint based on magnetorheological shear stiffening elastomer (MSSE) was proposed. Its stiffness can be adjusted by not only external magnetic field but also its inherent frequency-dependent property, ensuring the functionality of the rubber joint even when the controller fails. The prototype of the MSSE joint was fabricated and assembled. Stiffness controllability of the MSSE joint was evaluated using an material testing system (MTS) machine, with MTS testing performed under varying displacement litude at fixed frequency to investigate the influence of the varying displacement litude on the effective stiffness. The results revealed that the stiffness of this MSSE joint can be controlled effectively credited to the rate-dependent SSE and adjustable electromagnetics, exhibiting exceptional fail-safe characteristics. Lastly, a dynamic model was established to describe the dynamic performance of the rubber joint. All the above studies demonstrate the feasibility of the joint to satisfy the conflicting stiffness requirements to achieve high speed stability and curve trafficability simultaneously.
Light-controlled versatile manipulation of liquid metal droplets: a gateway to future liquid robots
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1MH00647A
Abstract: A light-controlled method for the versatile manipulation of liquid metal droplets is introduced. This approach shows the ability of inducing concurrent motion of multiple liquid metal droplets using infrared light without complex and bulky systems.
An effective permeability model to predict field-dependent modulus of magnetorheological elastomers
Publisher: Elsevier BV
Date: 11-2008
A novel exponential reaching law for sliding mode control of discrete-time system with disturbance
Publisher: IEEE
Date: 12-2019
Existence of bound-rubber in magnetorheological elastomers and its influence on material properties
Publisher: AIP Publishing
Date: 04-2007
DOI: 10.1360/CJCP2007.20(2).173.7
Abstract: In efforts to develop a new fabrication method for improvement of the MREs' performance, the bound-rubber phenomenon was observed in MREs. Further experiments indicate the existance of bound-rubber, and it influences the MRE performance as well as the particle size. Both theoretical analysis and experimental results indicated that MRE performance can be improved by enhancing the ratio of particle radius to bound-rubber thickness.
An electromagnetic variable inertance device for seat suspension vibration control
Publisher: Elsevier BV
Date: 11-2019
Vibration suppression of tunnel boring machines using non-resonance approach
Publisher: Elsevier BV
Date: 11-2020
Erratum to Development of an electrorheological chip and conducting polymer based sensor (Front. Mech. Eng. China (2009), 4(4), (472), DOI 10.1007/s11465-009-0077-y)
Publisher: Springer Science and Business Media LLC
Date: 27-10-2009
Evaluation of Different Bearing Fault Classifiers in Utilizing CNN Feature Extraction Ability
Publisher: MDPI AG
Date: 26-04-2022
DOI: 10.3390/S22093314
Abstract: In aerospace, marine, and other heavy industries, bearing fault diagnosis has been an essential part of improving machine life, reducing economic losses, and avoiding safety problems caused by machine bearing failures. Most existing bearing fault diagnosis methods face challenges in extracting the fault features from raw bearing fault data. Compared with traditional methods for bearing fault characteristics extraction, deep neural networks can automatically extract intrinsic features without expert knowledge. The convolutional neural network (CNN) was utilized most widely in extracting representative features of bearing faults. Fundamental to this, the hybrid models based on the CNN and in idual classifiers were proposed to diagnose bearing faults. However, CNN may not be suitable for all bearing fault classifiers. It is crucial to identify the classifiers which can maximize the CNN feature extraction ability. In this paper, four hybrid models based on CNN were built, and their fault detection accuracy and efficiency were compared. The comparative analysis showed that the random forest (RF) and support vector machine (SVM) could make full use of the CNN feature extraction ability.
Integration of an omnidirectional self-powering component to an MRE isolator towards a smart passive isolation system
Publisher: Elsevier BV
Date: 10-2020
Finite Element Analysis and Simulation Evaluation of a Magnetorheological Valve
Publisher: Springer Science and Business Media LLC
Date: 03-2003
New magnetorheological engine mount with controllable stiffness characteristics towards improved driving stability and ride comfort
Publisher: IOP Publishing
Date: 08-11-2022
Abstract: Engine mount is an important subassembly installed between the chassis and the engine. Its importance is mainly reflected by its capability of protecting the car body from the engine-induced vibrations. The current semi-active engine mount works to mitigate the vibration by changing its d ing, while the property of variable stiffness can further suppress the vibrations by reducing the vibration transmissibility. Therefore, this paper developed a new magnetorheological engine mount which can change its stiffness to shift the natural frequency of the mounting system away from the excitation frequency so that resonance can be avoided when the engine is starting. The stiffness controllability also meets the stiffness design conflict between vibration isolation requirement and engine stability requirement when the cars drive on rough roads. The characterization test has verified its field-dependent properties that the effective stiffness has increased by 80.65% and the equivalent d ing coefficient has increased by 26.85% as the applied current increases from 0 A to 1.5 A. Then a vibration isolation test was performed to evaluate the mounting system’s vibration reduction performance using a commercial internal combustion engine. The test results verified that the new magnetorheological engine mount under the semi-active control algorithm named Short Time Fourier Transformation is much better at suppressing the engine-induced vibrations than under passive control. And finally, a stability test was conducted and it verified that the new magnetorheological engine mount under Short Time Fourier Transformation control algorithm (semi-active control) performed better stability than the passive control. These experimental results indicate that this new magnetorheological engine mount is highly effective in isolating the engine-induced vibrations and keeping the driving stability.
Synthesis, modeling and characterization of conducting polymers
Publisher: SPIE
Date: 16-02-2005
DOI: 10.1117/12.582203
Modelling and experimental evaluation of a variable stiffness MR suspension with self-powering capability
Publisher: SAGE Publications
Date: 11-01-2021
Abstract: This paper presents the modelling and experimental evaluation of a semi-active vehicle suspension installed with a self-powered MR d er which is able to perform variable stiffness. Its variable stiffness feature as well as the self-powering capability was evaluated and verified using a hydraulic Instron test system. The testing results show that the stiffness of the d er is dependent on the current which can be generated by the self-powering component. A mathematic model was established to describe the dynamic properties of the MR d er and its power-generating capability. Finally, the self-powered MR suspension was installed on a quarter car test rig for its vibration isolation evaluation. A controller based on the short-time Fourier transform (STFT) was developed for the stiffness control. The evaluation result illustrates that the proposed MR d er can reduce the acceleration and displacement of the sprung mass by 16.8% and 21.4% respectively, compared with the passive system.
Application of Multidirectional Robotic Wire Arc Additive Manufacturing Process for the Fabrication of Complex Metallic Parts
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Dynamic response of symmetrical and asymmetrical sandwich plates with shear thickening fluid core subjected to penetration loading
Publisher: Elsevier BV
Date: 03-2016
Three-dimensional particle focusing under viscoelastic flow based on dean-flow-coupled elasto-inertial effects
Publisher: SPIE
Date: 26-01-2016
DOI: 10.1117/12.2211265
Performance Analysis of a Magnetorheological Damper with Energy Harvesting Ability
Publisher: Hindawi Limited
Date: 2016
DOI: 10.1155/2016/2959763
Abstract: A magnetorheological (MR) d er with energy harvesting ability was proposed based on electromagnetic induction (EMI) principle. The energy harvesting part was composed of a permanent magnet array and inducing coils which move vertically. This device could act as a linear power generator when the external excitation was applied, and the kinetic energy could be converted into electrical energy due to the relative linear motion between the magnets array and the inducing coils. Finite element models of both the MR d er part and the linear power generator part were built up separately to address the magnetic flux distributions, the magnetic flux densities, and the power generating efficiency using ANSYS software. The experimental tests were carried out to evaluate the d ing performance and power generating efficiency. The results show that the proposed MR d er can produce approximately 750 N d ing forces at the current of 0.6 A, and the energy harvesting device can generate about 1.0 V DC voltage at 0.06 m·s −1 excitation.
High Throughput Cell-Free Extraction of Plasma by an Integrated Microfluidic Device Combining Inertial Microfluidics and Membrane
Publisher: American Society of Mechanical Engineers
Date: 04-01-2016
Abstract: Plasma is a host of various analytes such as proteins, metabolites, circulating nucleic acids (CNAs), pathogens. The key process of plasma extraction is to eliminate the contamination from blood cells. Conventional methods, such as centrifugation and membrane filtration, are generally lab-intensive, time consuming and even dangerous. In this study, we report an integrated microfluidic device that combines inertial microfluidics and membrane filter. The integrated microfluidic device was evaluated by the diluted (x1/10, x1/20) whole blood, and the quality of the extracted blood plasma was tested. It was found that quality of extracted blood plasma from integrated device was equivalent to that obtained by the centrifugation. This study demonstrates a significant progress towards the practical application of inertial microfluidics with membrane filter for high-throughput and high efficient blood plasma extraction.
Comparison of rheological behaviors with fumed silica-based shear thickening fluids
Publisher: Springer Science and Business Media LLC
Date: 08-2016
Experimental investigation of creep and recovery behaviors of magnetorheological fluids
Publisher: Elsevier BV
Date: 08-2002
Soft magneto-sensitive elastomer and polyvinylidene fluoride polymer based nonlinear piezoelectric energy harvesting: design, modelling and experiment
Publisher: IOP Publishing
Date: 14-12-2018
Simulation of Traveling Wave Dielectrophoresis Using a Meshless Method
Publisher: IEEE
Date: 05-2006
Low-frequency vibration isolation via an elastic origami-inspired structure
Publisher: Elsevier BV
Date: 12-2023
Sensing capabilities of graphite based MR elastomers
Publisher: IOP Publishing
Date: 26-01-2011
Semi-active Variable Stiffness Vibration Control Of Vehicle Seat Suspension Using An MR Elastomer Isolator
Publisher: IOP Publishing
Date: 23-08-2011
Direct voltage control of magnetorheological damper for vehicle suspensions
Publisher: IOP Publishing
Date: 05-09-2013
Takagi–Sugeno Fuzzy Control for Semi-Active Vehicle Suspension With a Magnetorheological Damper and Experimental Validation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2017
Decision tree assisted EKF for vehicle slip angle estimation using inertial motion sensors
Publisher: IEEE
Date: 07-2014
Positioning a Magnetically Controlled Capsule Robot Based on Double-Layer Symmetric Sensor Array
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Comparative study of vehicle tyre–road friction coefficient estimation with a novel cost-effective method
Publisher: Informa UK Limited
Date: 17-06-2014
A soft-packaged and portable rehabilitation glove capable of closed-loop fine motor skills
Publisher: Springer Science and Business Media LLC
Date: 05-10-2023
Mode coupling chatter suppression for robotic machining using semi-active magnetorheological elastomers absorber
Publisher: Elsevier BV
Date: 02-2019
Sheathless Dean-flow-coupled elasto-inertial particle focusing and separation in viscoelastic fluid
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6RA25328H
Abstract: Sheathless particle focusing and separation in viscoelastic fluid is demonstrated using an integrated ECCA (straight channel section with asymmetrical expansion–contraction cavity arrays) straight channel.
Development of electrorheological chip and conducting polymer-based sensor
Publisher: Springer Science and Business Media LLC
Date: 27-10-2009
A new AI-surrogate model for dynamics analysis of a magnetorheological damper in the semi-active seat suspension
Publisher: IOP Publishing
Date: 04-02-2020
Abstract: This paper aims to develop a surrogate model for dynamics analysis of a magnetorheological d er (MRD) in the semi-active seat suspension system. An improved fruit fly optimization algorithm (IFOA) which enhances the global search capability of the original FOA is proposed to optimize the structure of a back propagation neural network (BPNN) in establishing the surrogate model. An MRD platform was fabricated to generate experimental data to feed the IFOA-BPNN model. Intrinsic patterns about the MRD dynamics behind the datasets have been discovered to establish a reliable MRD surrogate model. The outputs of the surrogate model demonstrate satisfactory dynamics characteristics in consistence with the experimental results. Moreover, the performance of the IFOA-BPNN based surrogate model was compared with that produced by the BPNN based, genetic algorithm-BPNN based, and FOA-BPNN based surrogate models. The comparison result shows better tracking capacity of the proposed method on the hysteresis behaviors of the MRD. As a result, the newly developed surrogate model can be used as the basis for advanced controller design of the semi-active seat suspension system.
Design of an enhanced wideband energy harvester using a parametrically excited array
Publisher: Elsevier BV
Date: 12-2017
Development of a smart rubber joint for train using shear thickening fluids
Publisher: IOP Publishing
Date: 07-04-2020
Analysis of a compact annular-radial-orifice flow magnetorheological valve and evaluation of its performance
Publisher: SAGE Publications
Date: 03-11-2017
Abstract: This article outlines a compact annular-radial-orifice flow magnetorheological valve through theoretical calculation, simulation analysis and experiment verification. The fluid flow paths of this proposed magnetorheological valve consist of a single annular flow channel, a single radial flow channel and an orifice flow channel through structural design. The finite element modelling and analysis of the magnetorheological valve was carried out using ANSYS/Emag software, including achieving optimal magnetic field distribution and yield stress in the annular flow path and radial flow path, respectively. Moreover, this proposed magnetorheological valve was prototyped and evaluated experimentally, showing that the magnetorheological valve has significantly improved its efficiency, especially the pressure drop at the 1.0 mm width of annular resistance gap and 0.5 mm width of radial resistance gap.
Development of an MR seat suspension with self-powered generation capability
Publisher: IOP Publishing
Date: 10-07-2017
Vibration Control Of Vehicle Seat Integrating With Chassis Suspension And Driver Body Model
Publisher: SAGE Publications
Date: 2013
Abstract: Vehicle seat suspension is one of very important components to provide ride comfort, in particular, commercial vehicles, to reduce driver fatigue due to long hours driving. This paper presents a study on active control of seat suspension to reduce vertical vibration transmitted from uneven road profile to driver body. The control problem will be firstly studied by proposing an integrated seat suspension model which includes vehicle chassis suspension, seat suspension, and driver body model. This is a new concept in the field of study because most of the current active and semi-active seat suspension studies only consider seat suspension or seat suspension with human body model, and road disturbance is generally assumed to be applied to the cabin floor directly. Controller design based an integrated model will enable the seat suspension to perform in a scenario where vibration caused by road disturbance is transmitted from wheel to seat frame and ride comfort performance is evaluated in terms of human body instead of seat frame acceleration. A static output feedback controller is then designed for the seat suspension with using measurement available signals. Driver mass variation and actuator saturation are also considered in the controller design process. The conditions for designing such a controller are derived in terms of linear matrix inequalities (LMIs). Finally, numerical simulations are used to validate the effectiveness of the proposed control strategy. It is shown from the driver body acceleration responses under both bump and random road disturbances that the newly designed seat suspension can improve vehicle ride comfort regardless of driver body mass variation.
Reversible Underwater Adhesion for Soft Robotic Feet by Leveraging Electrochemically Tunable Liquid Metal Interfaces
Publisher: American Chemical Society (ACS)
Date: 28-07-2021
Design of a bionic scallop robot based on jet propulsion
Publisher: IEEE
Date: 08-2019
Two-layer structure based adaptive estimation for vehicle mass and road slope under longitudinal motion
Publisher: Elsevier BV
Date: 2017
Fabrication and characterization of PDMS based magnetorheological elastomers
Publisher: IOP Publishing
Date: 23-04-2013
The continuous concentration of particles and cancer cell line using cell margination in a groove-based channel
Publisher: MDPI AG
Date: 25-10-2017
DOI: 10.3390/MI8110315
Shear thickening fluids in protective applications: A review
Publisher: Elsevier BV
Date: 12-2017
A Soft Mechatronic Microstage Mechanism Based on Electroactive Polymer Actuators
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2016
Double-Mode Microparticle Manipulation by Tunable Secondary Flow in Microchannel With Arc-Shaped Groove Arrays
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2017
Corrigendum: A highly adjustable magnetorheological elastomer base isolator for applications of real-time adaptive control (2013 Smart Mater. Struct. 22 095020)
Publisher: IOP Publishing
Date: 30-10-2014
The effect of graphene on the yarn pull-out force and ballistic performance of Kevlar fabrics impregnated with shear thickening fluids
Publisher: IOP Publishing
Date: 22-06-2018
Development of a novel magnetorheological brake with zigzag magnetic flux path
Publisher: IOP Publishing
Date: 12-11-2021
Abstract: In this research work, a novel disc-type configuration of magneto-rheological brake (MRB) with zigzag magnetic flux path is proposed. In this design, a rotor component consisting of several magnetic plates integrated in a disc made of non-magnetic material is implemented. A magnetic plate is separated with the others by nonmagnetic separators of the disc. Corresponding magnetic plates and separators are also implemented on the housing of the MRB. With this configuration, the magnetic flux line is forced to cross the MR fluid (MRF) duct from the disc to the housing at this separator and then from the housing to the disc at the next separator. This results in a zigzag magnetic flux path between the disc and the housing. The separators on each side of the housing are integrated on a bobbin, on which the magnetic coil is installed. When counter currents are applied to the coils on each side of the housing, a mutual magnetic field with zigzag flux lines across the MRF duct is generated. Based on the electromagnetic finite element and torque analysis, optimization problem considering the maximum achievable braking torque and the minimum mass of the MRB is performed. After that, optimal results of the MRB are obtained and compared with those of MRBs in previous works. Based on optimal results of the MRB with a maximum achievable braking torque of 20 Nm, an MRB prototype is fabricated and experimentally investigated to validate the simulation results.
A review of microfabrication techniques and dielectrophoretic microdevices for particle manipulation and separation
Publisher: IOP Publishing
Date: 08-01-2014
A torsional MRE joint for a C-shaped robotic leg
Publisher: IOP Publishing
Date: 17-11-2016
Analysis of vibration characteristics of magnetorheological elastomer sandwich beam under non-homogeneous magnetic field
Publisher: Trans Tech Publications, Ltd.
Date: 09-2012
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.101-102.202
Abstract: In this study, the MRE was manufactured, and the sandwich beam was also fabricated by treating with MRE between two thin aluminum layers. The experiment test rig was set up to investigate the vibration response of the MRE sandwich beam under non-homogeneous magnetic field. The experimental results show that the MRE sandwich beam had the capabilities of left shifting first natural frequency when the magnetic field was increased in the activated regions. It is also obvious that the first natural frequency of the MRE sandwich beam decreased as the magnetic field that applied on the beam was moved from the cl ed end of the beam to the free end of the beam.
Automated defect recognition of C-SAM images in IC packaging using Support Vector Machines
Publisher: Springer Science and Business Media LLC
Date: 11-08-2004
Integrating photovoltaic thermal collectors and thermal energy storage systems using phase change materials with rotary desiccant cooling systems
Publisher: Elsevier BV
Date: 2018
Rheological measurements and normal compression tests on shear thickening fluids below room temperature
Publisher: IOP Publishing
Date: 25-08-2023
Abstract: This work concentrated on the rheological measurements and normal compression tests of a shear thickening fluid (STF) below room temperature from −20 to 20 °C. The STF was made of 20% of fumed silica and 80% ethylene glycol in weight fraction. Experimental measurements were conducted with a parallel plate MCR301 rheometer. Temperature dependency, steady-state tests, oscillatory fRequency sweep tests, oscillatory shear strain litude sweep tests, and normal compression tests were applied on STF, and the testing results were analysed and discussed. The temperature played an important role in the performance of STF. The low temperature increased the STF’s viscosity and shear thickening effect but decreased the STF’s critical shear rate. Frequency was found to contribute to the STF’s phase change from the liquid state to the solid state. The normal compression tests were conducted to determine the equivalent stiffness of STF under different temperatures and various shear rates. The results showed that the STF’s equivalent normal stiffness could be increased by either lowering the applied temperature or increasing the shear rate. A mathematical model was adopted to represent the viscosity of STF in the temperature range from −20 to 20 °C.
Remote sensing image scene classification based on densely connected multilayer Kernel ELM
Publisher: IEEE
Date: 12-2019
Improving the critical speeds of high-speed trains using magnetorheological technology
Publisher: IOP Publishing
Date: 02-10-2013
A Review of Localization Systems for Robotic Endoscopic Capsules
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2012
3D Printed Helical Soft Pneumatic Actuators
Publisher: IEEE
Date: 07-2018
Enhanced Localization of Robotic Capsule Endoscopes Using Positron Emission Markers and Rigid-Body Transformation
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2019
3D actuation of foam-core liquid metal droplets
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2SM01349E
Abstract: The foam-core liquid metal (FCLM) droplets that can maintain the surface properties of LM while significantly reducing the density are developed, enabling 3D manipulation in an electrolyte.
Development and evaluation of a highly adaptive MRF-based absorber with a large effective frequency range
Publisher: IOP Publishing
Date: 29-08-2019
Dynamic behavior of MR suspensions at moderate flux densities
Publisher: Elsevier BV
Date: 04-2004
Applications of Controllable Smart Fluids to Mechanical Systems
Publisher: SAGE Publications
Date: 100
DOI: 10.1155/2014/254864
Multiobjective Heterogeneous Asymmetric Sliding Mode Control of Nonlinear Connected Autonomous Vehicles
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2022
Development and evaluation of a versatile semi-active suspension system for high-speed railway vehicles
Publisher: Elsevier BV
Date: 2020
Magnetically‐ and Electrically‐Controllable Functional Liquid Metal Droplets
Publisher: Wiley
Date: 22-01-2019
Numerical and experimental studies on a new variable stiffness and damping magnetorheological fluid damper
Publisher: SAGE Publications
Date: 22-04-2019
Performance comparison between an MRF damper and an MRE isolator incorporated with a building structure
Publisher: Trans Tech Publications, Ltd.
Date: 11-2010
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.37-38.862
Abstract: As an important member of smart materials, magnetorheological elastomers (MREs) exhibit characteristics that their modulus can be controlled by an external magnetic field. Based on these experimental results, a viscoelastic solid model with four parameters was proposed to predict the performance of MRE. A building model, three stories high, was constructed using MATLAB SIMULINK to evaluate the performance of an MRE device in structural control. In addition, the performance of an MRF d er and an MRE device in structural control, where the resultant peak force was selected as a criterion in the evaluation process, was compared and discussed. Two controllers, passive on and passive off control strategy were used to compare the response of structure. The effectiveness of an MRE bearing in structural control was well justified.
An innovative MRE absorber with double natural frequencies for wide frequency bandwidth vibration absorption
Publisher: IOP Publishing
Date: 13-04-2016
Silver Nanoflakes-Enhanced Anisotropic Hybrid Composites for Integratable Pressure Sensors.
Publisher: MDPI AG
Date: 16-11-2022
DOI: 10.3390/NANO12224018
Abstract: Flexible pressure sensors based on polymer elastomers filled with conductive fillers show great advantages in their applications in flexible electronic devices. However, integratable high-sensitivity pressure sensors remain understudied. This work improves the conductivity and sensitivity of PDMS-Fe/Ni piezoresistive composites by introducing silver flakes and magnetic-assisted alignment techniques. As secondary fillers, silver flakes with high aspect ratios enhance the conductive percolation network in composites. Meanwhile, a magnetic field aligns ferromagnetic particles to further improve the conductivity and sensitivity of composites. The resistivity of the composite decreases sharply by 1000 times within a tiny compression strain of 1%, indicating excellent sensing performance. On the basis of this, we demonstrate an integratable miniature pressure sensor with a small size (2 × 2 × 1 mm), high sensitivity (0.966 kPa
Comparison of dynamic models based on backbone curve for rotary magneto-rheological damper
Publisher: SAGE Publications
Date: 11-06-2019
Abstract: To realize the accurate control of magneto-rheological system, the nonlinear dynamic model as the joint of d er and control strategy is worthy of being investigated. In this study, the modeling methods based on the backbone curve are proposed to portray the dynamic characteristics of magneto-rheological d er. The modeling methods contain the phase lag method and the hysteresis ision method. Six novel algebraic models are deduced from the two methods and compared systematically. The parameters identification of models is conducted by the nonlinear least square method. The nonlinear least square optimization problem is solved by the Levenberg–Marquardt algorithm. The evaluation indexes including the root-mean-square error, mean deviation and computation time are calculated to evaluate the accuracy and feasibility of the novel models. Results show that the modeling methods and their models can describe the nonlinear hysteretic characteristics with feasibility and accuracy.
Applications of Magnetorheological Technology to Semiactive Vibration Control Systems
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/424368
Variable stiffness and damping suspension system for train
Publisher: SPIE
Date: 09-03-2014
DOI: 10.1117/12.2045023
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