ORCID Profile
0000-0002-0550-9223
Current Organisation
Swinburne University of Technology
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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.
Nanomanufacturing | Manufacturing Robotics and Mechatronics (excl. Automotive Mechatronics) | Nanophotonics | Nanotechnology |
Industrial Machinery and Equipment | Scientific Instruments | Expanding Knowledge in Technology
Publisher: IEEE
Date: 06-2013
Publisher: Springer Science and Business Media LLC
Date: 06-02-2022
Publisher: IEEE
Date: 06-2010
Publisher: IEEE
Date: 12-2009
Publisher: IEEE
Date: 06-2013
Publisher: Wiley
Date: 25-08-2017
DOI: 10.1002/ASJC.1612
Publisher: IEEE
Date: 06-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2022
Publisher: IEEE
Date: 12-2009
Publisher: Elsevier BV
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: MDPI AG
Date: 19-05-2022
Abstract: In this paper, a novel methodology for estimating the parameters of robotic manipulator systems is proposed. It can be seen that, for the purpose of parameter estimation, the input torque to each joint motor is designed as a linear combination of sinusoids. After the transient responses of joint angles exponentially converge to zero, the steady states of joint angle outputs can be extracted. Since the steady states of joint angles are the equivalent finite Fourier series, the coefficients of the steady state components of joint angles can be further extracted in a fundamental period. With the amazing finding that the steady states contain all dynamic information of manipulator systems, all unknown parameters of the system model can be accurately estimated with the extracted coefficients in finite frequency bands. The simulation results for a two-link manipulator are carried out to illustrate the effectiveness and robustness against measurement noise of the proposed method.
Publisher: IEEE
Date: 12-2014
Publisher: Informa UK Limited
Date: 2014
Publisher: IEEE
Date: 2006
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 02-2022
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2013
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-03-2021
DOI: 10.36227/TECHRXIV.14187125
Abstract: This paper proposes a novel control design method for high-precision positioning systems. The method aims to eliminate the tracking error caused by measurement quantization present in positioning systems with optical encoders. By employing a combined internal model based feedback and quantized feedforward design, we are able to make the output of the positioning system asymptotically track any input signal with one or more sinusoidal components of known frequencies and a possible constant component. When combined with a micro actuator, the resulting dual-stage positioning system is able to track any continuous periodic signal with a known period. Besides theoretical guarantees, the proposed design is validated experimentally and proved able to achieve asymptotic tracking error below ?1 ?m when subject to a sensor quantization level of 5 ?m. /
Publisher: Springer Science and Business Media LLC
Date: 10-07-2022
DOI: 10.1007/S11071-022-07682-2
Abstract: System uncertainties and external disturbances are the major causes of the trajectory tracking performance degradation in nonholonomic wheeled mobile robots (NWMRs). In this article, an adaptive fast nonsingular terminal sliding mode dynamic control (AFNTSMDC) method is proposed to provide enhanced robust and finite-time tracking performance for the NWMR. The proposed AFNTSMDC is a systematic design method based upon both the kinematic and dynamic model of the NWMR. The proposed controller has a simple form without singularity issue in the control input, which makes it practically implementable. The finite-time stability of the proposed tracking-error function is also proved using the Lyapunov function. Finally, circular trajectory tracking experiments are conducted to validate the robustness and convergence rate of the proposed AFNTSMDC scheme in comparison with the existing methods including classic kinematic control, robust sliding mode kinematic control, and conventional sliding mode dynamic control in the presence of uncertainties and external disturbances.
Publisher: IEEE
Date: 07-2016
Publisher: Springer Science and Business Media LLC
Date: 24-09-2019
Publisher: IEEE
Date: 06-2014
Publisher: IEEE
Date: 2006
Publisher: MDPI AG
Date: 16-09-2022
DOI: 10.3390/S22187031
Abstract: Computed Tomography (CT) is commonly used for cancer screening as it utilizes low radiation for the scan. One problem with low-dose scans is the noise artifacts associated with low photon count that can lead to a reduced success rate of cancer detection during radiologist assessment. The noise had to be removed to restore detail clarity. We propose a noise removal method using a new model Convolutional Neural Network (CNN). Even though the network training time is long, the result is better than other CNN models in quality score and visual observation. The proposed CNN model uses a stacked modified U-Net with a specific number of feature maps per layer to improve the image quality, observable on an average PSNR quality score improvement out of 174 images. The next best model has 0.54 points lower in the average score. The score difference is less than 1 point, but the image result is closer to the full-dose scan image. We used separate testing data to clarify that the model can handle different noise densities. Besides comparing the CNN configuration, we discuss the denoising quality of CNN compared to classical denoising in which the noise characteristics affect quality.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2006
Publisher: Thomas Telford Ltd.
Date: 2021
Abstract: The poor durability of ordinary Portland cement concrete and the corrosion of conventional steel reinforcement have a major impact on the viability, safety and serviceability of reinforced concrete structures, particularly in marine environments. Geopolymer concrete (GPC) reinforced with corrosion-free glass-fibre-reinforced polymer bars is ideal for projects such as bridge piers in coastal zones where corrosion is severe. This paper reports on an examination into the behaviour of this novel construction material under axial, combined and flexural loading and validation of a numerical model of the material. To this end, 11 GPC specimens constructed with various stirrup spacings were subjected to a range of loading conditions. The concrete was modelled using the widely used concrete damage plasticity model and linear elastic behaviour was used for the fibreglass bars and stirrups. The predicted axial load–deflection responses were in close agreement with the experimental data, especially for concentrically loaded columns. The load capacities of eccentrically loaded columns and beams were slightly overpredicted by the model due to a tendency of the fibreglass stirrups to open up prematurely.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-03-2021
DOI: 10.36227/TECHRXIV.14187125.V1
Abstract: This paper proposes a novel control design method for high-precision positioning systems. The method aims to eliminate the tracking error caused by measurement quantization present in positioning systems with optical encoders. By employing a combined internal model based feedback and quantized feedforward design, we are able to make the output of the positioning system asymptotically track any input signal with one or more sinusoidal components of known frequencies and a possible constant component. When combined with a micro actuator, the resulting dual-stage positioning system is able to track any continuous periodic signal with a known period. Besides theoretical guarantees, the proposed design is validated experimentally and proved able to achieve asymptotic tracking error below ?1 ?m when subject to a sensor quantization level of 5 ?m. /
Publisher: Elsevier BV
Date: 2019
Publisher: IEEE
Date: 05-2017
Publisher: IEEE
Date: 12-2018
Publisher: Elsevier BV
Date: 03-2014
Publisher: Elsevier BV
Date: 06-2018
DOI: 10.1016/J.SCITOTENV.2017.12.001
Abstract: Since its founding in 1993 the International Long-term Ecological Research Network (ILTER) has gone through pronounced development phases. The current network comprises 44 active member LTER networks representing 700 LTER Sites and ~80 LTSER Platforms across all continents, active in the fields of ecosystem, critical zone and socio-ecological research. The critical challenges and most important achievements of the initial phase have now become state-of-the-art in networking for excellent science. At the same time increasing integration, accelerating technology, networking of resources and a strong pull for more socially relevant scientific information have been modifying the mission and goals of ILTER. This article provides a critical review of ILTER's mission, goals, development and impacts. Major characteristics, tools, services, partnerships and selected ex les of relative strengths relevant for advancing ILTER are presented. We elaborate on the tradeoffs between the needs of the scientific community and stakeholder expectations. The embedding of ILTER in an increasingly collaborative landscape of global environmental observation and ecological research networks and infrastructures is also reflected by developments of pioneering regional and national LTER networks such as SAEON in South Africa, CERN/CEOBEX in China, TERN in Australia or eLTER RI in Europe. The primary role of ILTER is currently seen as a mechanism to investigate ecosystem structure, function, and services in response to a wide range of environmental forcings using long-term, place-based research. We suggest four main fields of activities and advancements for the next decade through development/delivery of a: (1) Global multi-disciplinary community of researchers and research institutes (2) Strategic global framework and strong partnerships in ecosystem observation and research (3) Global Research Infrastructure (GRI) and (4) a scientific knowledge factory for societally relevant information on sustainable use of natural resources.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2016
Publisher: IEEE
Date: 06-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2005
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2016
Publisher: Springer Science and Business Media LLC
Date: 29-08-2019
Publisher: IEEE
Date: 07-2020
Publisher: IEEE
Date: 06-2015
Publisher: Elsevier BV
Date: 2021
Publisher: IEEE
Date: 05-2007
Publisher: IEEE
Date: 12-2011
Publisher: Springer Science and Business Media LLC
Date: 30-01-2022
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 12-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2022
Publisher: IEEE
Date: 06-2015
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 06-2013
Publisher: Informa UK Limited
Date: 19-04-2017
Publisher: IEEE
Date: 12-2014
Publisher: IEEE
Date: 07-2019
Publisher: IEEE
Date: 06-2013
Publisher: Elsevier BV
Date: 05-2019
Publisher: IEEE
Date: 12-2015
Publisher: IEEE
Date: 2009
Publisher: IEEE
Date: 12-2014
Publisher: IEEE
Date: 09-12-2021
Publisher: Springer Science and Business Media LLC
Date: 24-07-2021
Publisher: IEEE
Date: 07-2007
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2013
Publisher: IEEE
Date: 10-2007
Publisher: Institution of Engineering and Technology (IET)
Date: 16-06-2020
Publisher: Elsevier BV
Date: 10-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2008
Publisher: IEEE
Date: 07-2019
Publisher: Elsevier BV
Date: 02-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 05-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 14-11-2018
Publisher: IEEE
Date: 07-2019
Publisher: IEEE
Date: 05-2007
Publisher: Inderscience Publishers
Date: 2017
Publisher: IEEE
Date: 2004
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 04-2023
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2020
Publisher: IEEE
Date: 12-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2015
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 12-2017
Publisher: IEEE
Date: 12-2018
Publisher: IEEE
Date: 07-2012
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2018
Publisher: Informa UK Limited
Date: 31-03-2017
Publisher: Inderscience Publishers
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 21-11-2018
Publisher: Informa UK Limited
Date: 08-2017
DOI: 10.2147/IJWH.S137250
Publisher: Elsevier BV
Date: 12-2021
Publisher: IEEE
Date: 06-2015
Publisher: Springer Science and Business Media LLC
Date: 23-01-2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2022
Publisher: IEEE
Date: 12-2014
Publisher: IEEE
Date: 10-2007
Publisher: Wiley
Date: 07-07-2019
DOI: 10.1002/RNC.4639
Publisher: IEEE
Date: 09-2015
Publisher: Wiley
Date: 14-11-2017
DOI: 10.1002/RNC.3702
Publisher: Elsevier BV
Date: 2011
Publisher: MDPI AG
Date: 16-02-2021
DOI: 10.3390/ACT10020033
Abstract: The ionic polymer metal composite (IPMC) actuator is a kind of soft actuator that can work for underwater applications. However, IPMC actuator control suffers from high nonlinearity due to the existence of inherent creep and hysteresis phenomena. Furthermore, for underwater applications, they are highly exposed to parametric uncertainties and external disturbances due to the inherent characteristics and working environment. Those factors significantly affect the positioning accuracy and reliability of IPMC actuators. Hence, feedback control techniques are vital in the control of IPMC actuators for suppressing the system uncertainty and external disturbance. In this paper, for the first time an adaptive full-order recursive terminal sliding-mode (AFORTSM) controller is proposed for the IPMC actuator to enhance the positioning accuracy and robustness against parametric uncertainties and external disturbances. The proposed controller incorporates an adaptive algorithm with terminal sliding mode method to release the need for any prerequisite bound of the disturbance. In addition, stability analysis proves that it can guarantee the tracking error to converge to zero in finite time in the presence of uncertainty and disturbance. Experiments are carried out on the IPMC actuator to verify the practical effectiveness of the AFORTSM controller in comparison with a conventional nonsingular terminal sliding mode (NTSM) controller in terms of smaller tracking error and faster disturbance rejection.
Publisher: Institution of Engineering and Technology (IET)
Date: 12-2015
Publisher: IEEE
Date: 06-2019
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 05-2010
Publisher: Springer Singapore
Date: 15-07-2019
Publisher: IEEE
Date: 08-2019
Publisher: Springer Science and Business Media LLC
Date: 14-06-2011
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2021
Publisher: Institution of Engineering and Technology (IET)
Date: 09-2020
Publisher: IEEE
Date: 07-2018
Publisher: IEEE
Date: 2005
Publisher: Institution of Engineering and Technology (IET)
Date: 13-11-2020
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2004
Publisher: IEEE
Date: 11-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2020
Publisher: IEEE
Date: 06-2015
Publisher: IEEE
Date: 12-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 06-2010
Publisher: Elsevier BV
Date: 06-2020
Publisher: IEEE
Date: 12-2014
Publisher: IEEE
Date: 12-2019
Publisher: IEEE
Date: 12-2015
Publisher: IEEE
Date: 17-10-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2022
Publisher: IEEE
Date: 08-2019
Publisher: Springer Science and Business Media LLC
Date: 21-10-2021
Publisher: Springer Science and Business Media LLC
Date: 13-09-2019
Publisher: MDPI AG
Date: 16-12-2021
DOI: 10.3390/W13243624
Abstract: The knowledge of climate change effects on variations of winter wheat yields are crucial for productions. Our objectives were to investigate the relationship between yield-related indices of winter wheat and the related climatic variables (selected using variance inflation factors) at the 20 sites of Xinjiang, China over 1981–2017. The background of climate and yield changes was analyzed from temporal and spatial respects. The number of independent climatic variables was selected with the variance inflation factor method to remove the multicollinear feature. The Pearson correlation was conducted between the first difference values of climatic variables and yield-related indices of winter wheat (namely plant height, growth period duration, 1000-kernel weight, kernel number per ear, biomass and yield) to find the key climatic variables that impacted winter wheat growth and yields. The multi-variate linear and nonlinear functions were established step by step using the selected key climatic variables. The best function was determined for each site (significant for p 0.05). From the results, there were general wetter and warmer trends of the climatic variables. Correspondingly, shortened winter wheat phenology and increased growth and yields were observed for most sites. Still, the climatic trends had mixed effects on winter wheat yields. The effects of precipitation, mean air temperature and relative humidity on plant height and growth period duration agreed well. Different sites had different major climatic drivers for winter wheat growth or yields, and the best functions of growth and yields could be linearly or nonlinearly, mostly described by multi-variate functions. The winter wheat growth or yield indices were also found to be closely connected with the soil water content status at the eight sites. The relationship between winter wheat growth or yield and climate provided useful references for forecasting crop production and for projecting the impact of future climate changes.
Publisher: Inderscience Publishers
Date: 2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2010
Publisher: IEEE
Date: 11-2017
Publisher: IOP Publishing
Date: 14-08-2017
Publisher: Institution of Engineering and Technology (IET)
Date: 10-2008
Publisher: Elsevier BV
Date: 03-2022
Publisher: Inderscience Publishers
Date: 2021
Publisher: Institution of Engineering and Technology (IET)
Date: 02-2017
DOI: 10.1049/EL.2016.4151
Publisher: Wiley
Date: 15-06-2022
DOI: 10.1002/RNC.6231
Abstract: This article proposes a sliding mode control scheme with exact convergence time for uncertain nonlinear systems. Terminal time regulator is defined for designing the global exact‐time time‐varying sliding mode. The proposed method has the following advantages: first, the reaching phase is absolutely eliminated from the initial time such that the sliding mode invariance is identically guaranteed on an entire dynamics second, on the sliding mode, the system state converges to the origin exactly at the predefined settling time instant, rather than at an uncertain time instant with boundedness as obtained by existing methods third, the control signal of the proposed controller is bounded even when the time approaches to the predefined settling time and fourth, low‐pass filtering is utilized to suppress the signal chattering in the discontinuous control while maintaining the system transient behaviors by selecting a proper time constant. Lyapunov analysis verifies that for any initial condition the closed‐loop system can terminally converge to zero exactly at the predefined time instant. The proposed control is finally generalized for Euler–Lagrange (EL) systems.
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 08-2020
Publisher: Elsevier BV
Date: 12-2021
Publisher: Institution of Engineering and Technology (IET)
Date: 08-2017
Publisher: Informa UK Limited
Date: 17-06-2017
Publisher: IEEE
Date: 2003
Publisher: Elsevier BV
Date: 08-2018
Publisher: Institution of Engineering and Technology (IET)
Date: 05-07-2012
Publisher: Inderscience Publishers
Date: 2021
Publisher: Wiley
Date: 18-08-2015
DOI: 10.1002/RNC.3406
Publisher: IEEE
Date: 08-2015
Publisher: IEEE
Date: 10-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2008
Publisher: Elsevier BV
Date: 10-2016
Publisher: IEEE
Date: 09-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 11-2014
Publisher: Springer Science and Business Media LLC
Date: 13-04-2010
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 09-2016
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 07-2017
Publisher: IEEE
Date: 12-2009
Publisher: Elsevier BV
Date: 02-2009
Publisher: IEEE
Date: 12-2010
Publisher: Elsevier BV
Date: 09-2011
Publisher: IEEE
Date: 11-2016
Publisher: IEEE
Date: 11-2016
Publisher: Elsevier BV
Date: 2023
Publisher: IEEE
Date: 06-2013
Publisher: Elsevier BV
Date: 12-2021
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 12-2020
Publisher: Springer International Publishing
Date: 25-11-2016
Start Date: 07-2023
End Date: 07-2026
Amount: $470,000.00
Funder: Australian Research Council
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