Aiming at the chaotic system of permanent magnet synchronous motor with model uncertainty and external disturbance,an adaptive sliding mode disturbance rejectionsynchronous control scheme based on novel variable speed reaching law is proposed. First,hyperbolic tangent function is constructed,and a new variable speed reaching law is designed. The deceleration point is set,and the convergence speed of sliding mode variable is accelerated before reaching the deceleration point,and the gain is reduced after reaching the deceleration point. Effectively reduce the buffeting amplitude of the controller. At the same time,in order to further improve the anti-disturbance performance of the system,an extended state observer is introduced to estimate the disturbance and internal uncertainty of the system for feedforward compensa-tion. The results show that the adaptive sliding mode control strategy based onextended state observer pro-posed in this paper can make the motor system with model uncertainty and external disturbance enter the synchronous state in the finite time and suppress the chattering phenomenon. Compared to the traditional ex-ponential approach method,the jitter amplitude value has been reduced by 64％.
关键词
趋近律/自适应滑模/混沌系统/有限时间控制/扩张状态观测器
Key words
reaching law/adaptive sliding mode control/chaotic systems/finite-time control/extended state observer
维普
万方数据