Abstract
This paper presents a robust fault reconstruction scheme for a class of nonlinear descriptor systems that is affected by disturbances. The fault enters the system both linearly and through nonlinear functions in both the state and output equations. The system is first re-expressed into a form which is easier to manipulate. Two cases are considered: in the first case, the fault is present in the nonlinear function of the output equation, whereas in the second case, the nonlinear function of the output equation does not contain the fault. In each case, a nonlinear descriptor observer is used to reconstruct the fault, where the gains of the observer are designed using linear matrix inequalities such that the effect of disturbances on the fault reconstruction is bounded. As a result of their structure, the proposed descriptor observers do not require restrictions on the rates of the input and disturbances (unlike in observers using a state-space structure) which makes the proposed observers more widely applicable. Finally, two simulation examples are performed to verify the performance of the proposed observers.
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This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No.2020R1C1C1012707) and also was supported by National University Development Project in 2020.
Joseph Chang Lun Chan received his B.Eng. (Hons.) and Ph.D. degrees from Monash University Malaysia, in 2013 and 2019, respectively. He was a postdoctoral researcher from 2019 to 2021 in Jeonbuk National University, Korea, where he was also a Brain Korea Plus (BK21+) Postdoctoral Fellowship Scholar. Since 2021, he has been a postdoctoral research fellow in Monash University Malaysia. His research focusses on application of sliding mode observers in non-infinitely observable descriptor systems and other practical systems, as well as fault reconstruction in non-linear systems.
Wen-Shyan Chua obtained his Ph.D. degree in control systems engineering and a B.Eng. degree in mechatronics engineering from Monash University Malaysia and is a registered Professional Technologist under the Malaysian Board of Technologists (MBOT). He is currently the Head of Malaysian Smart Factory 4.0 @ Selangor Human Resource Development Centre (SHRDC) which is a recognized technology centre by the Malaysian Productivity Corporation (MPC) to support and accelerate Industry 4.0 technology adoption within the Malaysian Industries. He currently focuses on developing community-driven and open-source technology integration and use cases to boost adoption of Industry 4.0 within the industries and community in Malaysia.
Tae H. Lee received his B.S., M.S., and Ph.D. degrees in electrical engineering from Yeungnam University, Korea, in 2009, 2011, and 2015, respectively. He was a postdoctoral researcher in the same university from 2015 to 2017 and a Alfred Deakin Postdoctoral Research Fellow at Institute for Intelligent Systems Research and Innovation, Deakin University, Australia in 2017. He began with Jeonbuk National University, Korea in 2017, where he is currently an Associate Professor. His research interests are in the field of stability analysis, sampleddata control, dynamics of systems, and control issues in network systems. He is an author/coauthor of several journal papers and books. Dr. Lee currently serves as an Associate Editor for the Applied Mathematics and Computation.
Chee Pin Tan received his B.Eng. (Hons.) and Ph.D. degrees from University of Leicester, Leicester, UK, in 1998 and 2002, respectively. He is currently a Professor at the School of Engineering, Monash University Malaysia, Bandar Sunway, Malaysia. He has authored more than 60 internationally peer-reviewed research articles, including a book on fault reconstruction. His research interests include robust fault estimation and observers. He is currently an Associate Editor of the Journal of the Franklin Institute and the International Journal of Systems Science.
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Chan, J.C.L., Chua, WS., Lee, T.H. et al. Descriptor Observers for Robust Fault Reconstruction in a Class of Nonlinear Descriptor Systems. Int. J. Control Autom. Syst. 21, 697–710 (2023). https://doi.org/10.1007/s12555-022-0180-y
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DOI: https://doi.org/10.1007/s12555-022-0180-y