To address the issues in the operation of permanent magnet synchronous motors(PMSM),such as load disturbances and parameter variations that can affect the speed of the motors,an adaptive sliding mode control strategy based on an improved extended state observer is proposed to improve the robustness of PMSM.First,an improved extended state observer is designed to dynamically adjust the observer gain according to the magnitude of the disturbance,and the response speed of the system is improved.Second,an adaptive sliding mode controller is designed to determine the optimal sliding mode surface coefficient through a cost function,and further an adaptive sliding mode surface is designed to improve the convergence speed of the system.Finally,an adaptive law is introduced to estimate the observation error of the disturbance online.The simulation results show that the proposed method can effectively overcome the influence of load disturbances and parameter perturbations on the speed of PMSMs and improve the robustness of the system.
关键词
永磁同步电机/改进扩展状态观测器/滑模控制/自适应律
Key words
permanent magnet synchronous motor(PMSM)/improved extended state observer/sliding mode control/adaptive law
维普
万方数据