Abstract
An observer-based fault-tolerant control method is proposed for a linear system with sensor saturation constraint. Considering the linear system with simultaneous actuator faults and sensor faults, the sensor saturation would bring the output measurement error of the system, which would result in the estimation performance degradation. Firstly, the intermediate estimator is modified to estimate the system states and fault signals at the simultaneous time, and the fault-tolerant controller is designed based on the estimation to compensate the effect of actuator faults effectively. Through Lyapunov stability analysis, the sufficient conditions are obtained to ensure the states of closed-loop system to be uniformly ultimately bounded. The effect of sensor saturation error can be suppressed by adjusting some specified parameters directly without introducing any performance index. Finally, the effectiveness and superiority of the proposed method are verified by a simulation example.
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Recommended by Editor Jessie (Ju H.) Park. This work was supported in part by the National Natural Science Foundation of China under Grant 61803334, in part by the Zhejiang Provincial Natural Science Foundation of China under Grant LQ18F030012, in part by the State Scholarship Fund of China Scholarship Council under Scholarship 201908330040.
Jun-Wei Zhu received his B.S. degree in Control Theory and Engineering from Northeastern University, China, in 2008, his M.S. degree in Control Theory and Engineering from Shenyang University, China, in 2011, and his Ph.D. degree in Control Theory and Engineering from Northeastern University, China, in 2016. Currently, he is a special-termed Associate Professor at the College of Information Engineering, Zhejiang University of Technology. He is also a visiting professor of the Institute for Automatic Control and Complex Systems (AKS), University of Duisburg-Essen, Germany, from September 2019 to September 2020. His research interests include cyber-physical systems, fault diagnosis and fault tolerant control.
Qiao-Qian Zhou received her B.Eng. degree in electrical engineering and automation from Ningbo University of Technology, Ningbo, China, in 2016. She is currently pursuing a Ph.D. degree with the College of Information Engineering, Zhejiang University of Technology, Hangzhou, China.
Jian-Ming Xu received his B.S. degree in engineering from Nanchang University in 1998, and his M.S. and Ph.D. degrees from Zhejiang University of Technology, Hangzhou, China. He is currently a Professor in the College of Information Engineering, Zhejiang University of Technology, China. His current research interests include robot control and planning, fault detection.
Jian-Wei Dong received his B.Eng. degree in automation from Suzhou University, Suzhou, China, in 2016. He is currently pursuing a Ph.D. degree with the College of Information Engineering, Zhejiang University of Technology, Hangzhou, China.
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Zhu, JW., Zhou, QQ., Xu, JM. et al. Fault-tolerant Control for Linear System Under Sensor Saturation Constraint. Int. J. Control Autom. Syst. 19, 20–28 (2021). https://doi.org/10.1007/s12555-019-0941-4
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DOI: https://doi.org/10.1007/s12555-019-0941-4