Nonsingular Fast Terminal Sliding Mode Control Strategy for PMLSM Based on Disturbance Compensation

• Published in: Journal of electrical engineering & technology Vol. 19; no. 3; pp. 1331 - 1342
• Main Authors: Li, Zheng, Zhang, Zi-Hao, Wang, Jin-Song, Yan, Zhi-Bang, Guo, Xiao-Qiang, Sun, He-Xu
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.03.2024; 대한전기학회
• Subjects: Electrical Engineering; Electrical Machines and Networks; Electronics and Microelectronics; Engineering; Instrumentation; Original Article; Power Electronics; 전기공학; Permanent magnet linear synchronous motor; Nonsingular fast terminal sliding mode controller; Noval exponential reaching law; Extended sliding mode disturbance observer
• ISSN: 1975-0102; 2093-7423
• DOI: 10.1007/s42835-023-01590-0

To optimize the anti-interference performance and dynamic response ability of permanent magnet linear synchronous motor (PMLSM) and enhance the overall control performance of the system, the novel nonsingular fast terminal sliding mode controller (NFTSMC) based on disturbance compensation is proposed in this design. To enhance the response speed and stability of the controller, this design introduces the system state variable into the exponential reaching law to make the controller adaptively adjust with the change of the system state, which can reduce the chattering of the system and have a faster response speed. The extended sliding mode disturbance observer is designed to estimate the interference factors in the system, and the controller is feedforward compensated to further improve the anti-interference ability of the PMLSM system. Meanwhile, the control strategy is proved by the Lyapunov stability theory. Simulation and experiments show that the proposed control strategy has better dynamic response ability and anti-interference ability than the traditional NFTSMC.