Zhang Xin, Li Hongwen, Shao Meng
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Sensors (Basel). 2024 Feb 28;24(5):1561. doi: 10.3390/s24051561.
This paper focuses on the speed control of a permanent magnet synchronous motor (PMSM) for electric drives with model uncertainties and external disturbances. Conventional sliding mode control (CSMC) can only converge asymptotically in the infinite domain and will cause unacceptable sliding mode chattering. To improve the performance of the PMSM speed loop in terms of response speed, tracking accuracy, and robustness, a hybrid control strategy for a fixed-time-convergent sliding mode controller (FSMC) with a fixed-time-convergent sliding mode observer (FSMO) is proposed for PMSM speed regulation using the fixed-time control theory. Firstly, the FSMC is proposed to improve the convergence speed and robustness of the speed loop, which can converge to the origin within a fixed time independent of the initial conditions. Then, the FSMO is used as a compensator to further enhance the robustness of the speed loop and attenuate sliding mode chattering. Finally, simulation and experimental results show that the proposed method can effectively improve the dynamic performance and robustness of the PMSM speed control system.
本文聚焦于具有模型不确定性和外部干扰的电力驱动永磁同步电机（PMSM）的速度控制。传统滑模控制（CSMC）仅能在无限域中渐近收敛，且会导致不可接受的滑模抖振。为了在响应速度、跟踪精度和鲁棒性方面提升PMSM速度环的性能，基于固定时间控制理论，提出了一种用于PMSM速度调节的、带有固定时间收敛滑模观测器（FSMO）的固定时间收敛滑模控制器（FSMC）的混合控制策略。首先，提出FSMC以提高速度环的收敛速度和鲁棒性，其可在与初始条件无关的固定时间内收敛至原点。然后，将FSMO用作补偿器，以进一步增强速度环的鲁棒性并减弱滑模抖振。最后，仿真和实验结果表明，所提方法能有效提高PMSM速度控制系统的动态性能和鲁棒性。
