Sensors Fault Diagnosis and Active Fault-Tolerant Control for PMSM Drive Systems Based on a Composite Sliding Mode Observer

Qinyue Zhu, Zhaoyang Li, Xitang Tan, Dabo Xie and Wei Dai
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Qinyue Zhu: Department of Electrical Engineering, Tongji University, Shanghai 201804, China
Zhaoyang Li: Department of Electrical Engineering, Tongji University, Shanghai 201804, China
Xitang Tan: Department of Electrical Engineering, Tongji University, Shanghai 201804, China
Dabo Xie: Department of Electrical Engineering, Tongji University, Shanghai 201804, China
Wei Dai: Department of Electrical Engineering, Tongji University, Shanghai 201804, China

Energies, 2019, vol. 12, issue 9, 1-20

Abstract: Due to the use of multiple observers and controllers in multi-sensor fault-tolerant control of PMSM drive systems, the algorithm is complex and the system control performance is affected. In view of this, the paper studies multi-sensor fault diagnosis and active fault-tolerant control strategies based on a composite sliding mode observer. With the mathematical model of PMSM built, a design method of the composite sliding mode observer is proposed. A single observer is used to observe and estimate various state variables in the system in real time, which simplifies the implementation of observer-related algorithms. In order to improve the diagnostic accuracy of different types of sensors under different faults, a method for determining fault thresholds is proposed through global search for the maximum residual value. Based on this, a fault diagnosis and active fault-tolerant control strategy is proposed to realize fast switching and reconstruction of feedback signals of closed-loop control systems under different faults of multiple sensors, thus restoring the system performance. Finally, the effectiveness of the proposed algorithm and control strategy is verified by simulation experiments

Keywords: PMSM drive system; sliding mode observer; fault diagnosis; active fault-tolerant control; sensor fault (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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