Transactions of China Electrotechnical Society  2019, Vol. 34 Issue (1): 33-40    DOI: 10.19595/j.cnki.1000-6753.tces.171676
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LMI-Based Sliding Mode Displacement Tracking Control for Permanent Magnet Linear Synchronous Motor
Sun Yibiao, Zhong Yuan, Liu Chunfang
School of Electrical Engineering Shenyang University of Technology Shenyang 110870 China

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Abstract  When the linear servo system was used in some high-response and high-accuracy occasion, permanent magnet linear synchronous motor’s time scale of the dynamic process of the current was close to that of its speed. Hence, if the three closed-loop PID control method based on traditional vector control was employed for static decoupling, tracking performance would be compromised due to non-linear coupling between current and speed. To address this problem, a LMI-based sliding mode control scheme was proposed in this paper for displacement tracking control in the linear servo system. The electronic sub-system and the mechanical sub-system were controlled as a whole. The sliding mode control law was designed via linear matrix inequalities (LMIs).The extended sliding mode observer was designed to observe the load disturbance robustly for ensuring the system’s tracking performance. Experiments are performed to compare with the three closed-loop PID control method. Results demonstrate that the proposed method achieves more robust performance and faster dynamic response.
Key wordsLinear matrix inequality      sliding mode control      extended sliding mode observer      linear servo system      permanent magnet linear synchronous motor     
Received: 12 December 2017      Published: 10 January 2019
PACS: TM359.4  
  TP273  
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Sun Yibiao
Zhong Yuan
Liu Chunfang
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Sun Yibiao,Zhong Yuan,Liu Chunfang. LMI-Based Sliding Mode Displacement Tracking Control for Permanent Magnet Linear Synchronous Motor[J]. Transactions of China Electrotechnical Society, 2019, 34(1): 33-40.
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