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The research of fuzzy sliding mode velocity control of PMLSM |
Zhang Yuzeng1, Zhou Ruizhi2, Li Shuai2 |
1. School of Mechanical Engineering, Shenyang Ligong University, Shenyang 110168; 2. School of Science and Technology, University of Science and Technology Liaoning, Anshan, Liaoning 114051 |
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Abstract In view of the influence of load variation, parameter disturbance and end effect on the permanent magnet linear drive servo system, this paper proposes a new fuzzy sliding mode speed control method based on the load thrust observer. In this method, a new variable index approach law is used instead of the traditional variable index approach law to improve the quality of the sliding mode approach motion. The disturbance is observed and compensated by the load thrust observer, and the fuzzy control is used instead of the switching control to estimate the parameters on-line in real time, so as to better achieve the purpose of suppressing chattering. The simulation results show that compared with the traditional Sliding mode controller, the system controlled by this method has the characteristics of fast dynamic response and good robustness, and can significantly reduce the tracking error of the system.
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Received: 08 April 2020
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