A composite sliding mode control with the first-order differentiator and sliding mode observer for permanent magnet synchronous machine

Junjie Hong; Xijian Lin; Jianbo Zhang; Wei Huang; Baiping Yan; Xiyu Li

doi:10.1016/j.isatra.2024.02.006

A composite sliding mode control with the first-order differentiator and sliding mode observer for permanent magnet synchronous machine

ISA Trans. 2024 Apr:147:489-500. doi: 10.1016/j.isatra.2024.02.006. Epub 2024 Feb 13.

Authors

Junjie Hong¹, Xijian Lin², Jianbo Zhang¹, Wei Huang¹, Baiping Yan¹, Xiyu Li¹

Affiliations

¹ School of Automation, Guangdong University of Technology, Guangzhou 510006, China.
² School of Automation, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: chase_lxj@163.com.

PMID: 38395719
DOI: 10.1016/j.isatra.2024.02.006

Abstract

This paper proposes a composite sliding mode control (SMC) to optimize the tracking performance and the anti-disturbance performance of permanent magnet synchronous machine (PMSM) speed regulation systems. The differential term in the control law can magnify the measurement noise, resulting in more discontinuity. To filter out the high frequency noise and make the control law smoother, the first-order differentiator (FOD) is employed to estimate the speed error and its derivative. Since the feedforward compensation can improve the robustness of the system, a disturbance observer (DOB) based on the sliding mode observer (SMO) is designed to reinforce the dynamic performance under disturbance variation. Under the effect of the feedforward compensation, chattering can be further weakened by decreasing the switching gain appropriately. Finally, the effectiveness of the proposed methods is confirmed by various experimental results.

Keywords: Anti-disturbance performance; Chattering attenuation; Permanent magnet synchronous machine (PMSM); Sliding mode control (SMC); Tracking performance.