ORCID Profile
0000-0002-2269-2912
Current Organisations
Flinders University
,
University of Adelaide
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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.
Electrical and Electronic Engineering | Engineering not elsewhere classified | Energy Generation, Conversion and Storage Engineering | Mineral Processing/Beneficiation | Decision Support and Group Support Systems | Mechanical Engineering | Control Systems, Robotics and Automation
Solar-Thermal Energy | Beneficiation or Dressing of Iron Ores | Mining and Extraction of Precious (Noble) Metal Ores | Mining and Extraction of Copper Ores |
Publisher: Elsevier BV
Date: 02-2013
Publisher: IEEE
Date: 05-2008
Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 2008
Publisher: SAGE Publications
Date: 28-05-2021
Abstract: This study deals with improving airfoil active flutter suppression under control-input constraints from the optimal control perspective by proposing a novel optimal neural-network control. The proposed approach uses a modified value function approximation dynamically tuned by an extended Kalman filter to solve the Hamilton–Jacobi–Bellman equality online for continuously improved optimal control to address optimality in parameter-varying nonlinear systems. Control-input constraints are integrated into the controller synthesis by introducing a generalized nonquadratic cost function for control inputs. The feasibility of using a performance index involving the nonquadratic control-input cost with the modified value function approximation is examined through the Lyapunov stability analysis. Wind tunnel experiments were conducted for controller validation, where an optimal controller synthesized offline via linear parameter-varying technique was used as a benchmark and compared. It is shown, both theoretically and experimentally, that the proposed method can effectively improve airfoil active flutter suppression under control-input constraints.
Publisher: Elsevier BV
Date: 2012
Publisher: IEEE
Date: 07-2017
Publisher: IEEE
Date: 2000
Publisher: Springer Science and Business Media LLC
Date: 04-08-2010
Publisher: MDPI AG
Date: 15-05-2019
DOI: 10.3390/MA12101596
Abstract: Ni45Co5Mn40Sn10 Heusler alloy was fabricated with elemental powders, using a powder processing route of press and sinter, in place of vacuum induction melting or arc melting route. The effects of process parameters, such as compaction load, sintering time, and temperature, on the transformation characteristics and microstructures of the alloy were investigated. While the effect of compaction pressure was not significant, those of sintering time and temperature are important in causing or annulling martensitic transformation, which is characteristic of Heusler alloys. The processing condition of 1050 °C/24 h was identified to be favorable in producing ferromagnetic Heusler alloy. Longer durations of sintering resulted in an increased γ-phase fraction, which acts as an impediment to the structural transformation.
Publisher: Elsevier BV
Date: 03-2023
Publisher: Wiley
Date: 28-02-2011
DOI: 10.1002/ASJC.347
Publisher: IEEE
Date: 07-2019
Publisher: Trans Tech Publications, Ltd.
Date: 05-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.233-235.2820
Abstract: In this paper, a neural network method is proposed to solve a one dimensional inverse heat conduction problem (IHCP). The method relies on input/output data of an unknown system to create an intelligent neural network model. Multi layer perceptrons with recurrent properties are utilised in the model. Prepared input/output data are used to train the neural network. Reliable checking processes are also offered to justify the robustness of the method. A numerical sequential function specification (SFS) method is used as another technique to solve the IHCP. The numerical result is compared with that of the proposed method and good agreement is shown between the two methods. However, the numerical method can be only used to solve the IHCP off-line due to the high computation requirement. The proposed neural network method can be used in real-time situations as shown in the experimental tests.
Publisher: Elsevier BV
Date: 07-2012
Publisher: IEEE
Date: 11-2007
Publisher: Springer Science and Business Media LLC
Date: 2010
Publisher: Elsevier BV
Date: 06-2015
Publisher: IEEE
Date: 05-2009
Publisher: Elsevier BV
Date: 10-2018
Publisher: IEEE
Date: 02-2007
Publisher: IEEE
Date: 06-2008
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 06-2023
Publisher: Elsevier BV
Date: 02-2009
Publisher: MDPI AG
Date: 11-06-2018
DOI: 10.3390/MA11060988
Publisher: IEEE
Date: 06-2014
Publisher: Elsevier BV
Date: 2008
Publisher: Informa UK Limited
Date: 24-12-2020
Publisher: Elsevier BV
Date: 03-2020
Publisher: IEEE
Date: 2003
Publisher: IEEE
Date: 11-2007
Publisher: American Society of Civil Engineers
Date: 23-07-2009
Publisher: IEEE
Date: 02-2019
Publisher: Wiley
Date: 17-11-2015
DOI: 10.1002/ASJC.1038
Publisher: Elsevier BV
Date: 05-2022
Publisher: IEEE
Date: 06-2013
Publisher: IEEE
Date: 02-2009
Publisher: American Society of Civil Engineers (ASCE)
Date: 05-2023
Publisher: Elsevier BV
Date: 11-2017
Publisher: IEEE
Date: 08-2020
Publisher: Elsevier BV
Date: 07-2015
Publisher: IEEE
Date: 07-2015
Publisher: American Society of Civil Engineers (ASCE)
Date: 07-2021
Publisher: American Society of Civil Engineers (ASCE)
Date: 2023
Publisher: Wiley
Date: 09-2009
DOI: 10.1002/ASJC.129
Publisher: Springer International Publishing
Date: 2019
Publisher: Wiley
Date: 02-08-2012
DOI: 10.1002/ASJC.449
Publisher: IEEE
Date: 07-2015
Publisher: IEEE
Date: 05-2008
Publisher: Informa UK Limited
Date: 11-08-2021
Publisher: IEEE
Date: 12-2009
Publisher: Elsevier BV
Date: 04-2019
Publisher: Informa UK Limited
Date: 04-11-2017
Publisher: Trans Tech Publications, Ltd.
Date: 05-2012
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMM.166-169.1709
Abstract: The control methods used for free/shock vibration suppression are normally different from those used for forced vibration cancellation, because shock vibration is regarded as a type of transient vibration that is different in nature from steady-state forced vibration. However, both steady-state and shock excitations may occur in flexible structures, so there is a need to control both types of vibrations. To show the integration of the two different vibration control strategies, a hybrid control system based on adhesive strain gauges and PZT patches is proposed to construct a distributed resonant absorber and shock absorber together. The hybrid system is governed by a control arbitrator that decides which absorber should be active according to the different excitation conditions. The effectiveness of the integrated system is shown through simulation and experimental studies.
Publisher: American Chemical Society (ACS)
Date: 22-05-2015
DOI: 10.1021/JE501113Y
Publisher: IEEE
Date: 12-2009
Publisher: Elsevier BV
Date: 02-2023
Publisher: IEEE
Date: 07-2013
Publisher: MDPI AG
Date: 29-12-2022
DOI: 10.3390/EN15010206
Abstract: Lowering the condensing temperature of the Refrigeration and Air-conditioning (RAC) system has been proven to effectively increase the system’s Coefficient of Performance (COP). This paper revolves around evaluating the energy-saving generated by applying a Thermal Diode Tank (TDT) in the RAC systems. The TDT is a novel invention, which is an insulated water tank equipped with gravity heat pipes. If the TDT was placed outdoors overnight, its inside water would theoretically be at the minimum ambient temperature of the previous night. When the TDT water is used to cool the condenser of RAC systems that operate during the daytime, a higher COP of this TDT assisted RAC (TDT-RAC) system could be achieved compared with the baseline system. In this study, a steady-state performance simulation model for TDT-RAC cycles has been developed. The model reveals that the COP of the TDT-RAC cycle can be improved by 10~59% over the baseline cycle depending on the compressor types. The TDT-RAC cycle with a variable speed compressor can save more energy than that with a fixed speed compressor. In addition, TDT-RAC cycles can save more energy with a higher day/night ambient temperature difference. There is a threshold tank size for a given TDT-RAC cycle to save energy, and the energy-saving can be improved by enlarging the tank size. A desk-top case study based on real weather data for Adelaide in January 2021 shows that 9~40% energy could be saved by TDT-RAC systems every summer day on average.
Publisher: IEEE
Date: 07-2013
Publisher: Elsevier BV
Date: 07-2016
Publisher: SAGE Publications
Date: 15-01-2018
Abstract: This paper proposes a novel adaptive nonlinear controller based on neural-networks (NNs) for active suppression of airfoil flutter (ASAF) from the optimal control perspective. Optimal control laws for locally nonlinear systems are synthesized in real time by solving the Hamilton–Jacobi–Bellman equation online with a proposed new form of NN-based value function approximation (VFA) and an extended Kalman filter. A systematic procedure based on linear matrix inequalities is further proposed for designing a scheduled parameter matrix that generalizes the new form of VFA to globally nonlinear systems to suit ASAF applications. Un-modeled dynamics are captured using an NN identifier. Comparisons drawn with a linear-parameter-varying optimal controller in wind-tunnel experiments confirm the effectiveness and validity of the proposed control scheme.
Publisher: IEEE
Date: 2006
Publisher: IEEE
Date: 2000
Publisher: Elsevier BV
Date: 07-2018
Publisher: Elsevier BV
Date: 03-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 11-2020
Publisher: IEEE
Date: 11-2022
Publisher: Elsevier BV
Date: 10-2021
Publisher: Elsevier BV
Date: 2018
Publisher: IEEE
Date: 06-2010
Publisher: MDPI AG
Date: 09-09-2023
DOI: 10.3390/EN16186506
Publisher: Wiley
Date: 11-2010
DOI: 10.1002/ASJC.243
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 10-2016
Publisher: SAGE Publications
Date: 11-08-2015
Abstract: Piezoelectric actuators are the foremost actuators in the area of nanopositioning. However, the sensors employed to measure the actuator displacement are expensive and difficult, if not impossible, to use. Mathematical models can map the easy-to-measure electrical signals to the displacements of the actuators as the displacement sensors are replaced with the models. In addition, these models can be used in model-based control system design. Two main groups of mathematical models are used for this purpose: black box and physics-based models. As an advantage, the latter has a much smaller number of parameters reducing computational demand in real-time applications. However, physics-based models suffer from (1) the relatively low accuracy of the models and (2) non-standard and ad-hoc parameter identification methods. In this research, to improve the model accuracy, mathematical structure of a well-known physics-based model, the Voigt model, is enhanced by adding two complementary terms inspired by another model, the Preisach model. Then, a standard method based on the evolutionary algorithms is proposed to identify the model’s parameters. The proposed ideas are substantiated to increase the applicability and accuracy of the model, and they are easily extendable to other physics-based models of piezoelectric actuators. The newly proposed enhanced structure of the Voigt model doubles the estimation accuracy of the original model and results in accuracies comparable with black box models.
Publisher: International Institute of Acoustics and Vibration (IIAV)
Date: 2007
Publisher: Elsevier BV
Date: 08-2018
Publisher: IEEE
Date: 09-2013
Start Date: 11-2012
End Date: 06-2015
Amount: $195,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 08-2020
End Date: 08-2026
Amount: $3,703,664.00
Funder: Australian Research Council
View Funded Activity