基于模糊扰动观测器的PMSM积分滑模控制研究

PMSM INTEGRAL SLIDING MODE CONTROL BASED ON FUZZY DISTURBANCE OBSERVER

为了克服传统永磁同步电机(Permanent magnet synchronous motor,PMSM)的滑模控制增益大容易产生抖振的问题,提出基于模糊观测器的PMSM积分滑模控制策略。采用新型趋近律设计积分滑模控制器取代传统的滑模控制器,提高系统的动态响应性能。结合模糊控制与自适应控制的特点,设计模糊扰动观测器,能够迅速有效地观测系统内部参数变化和外部扰动,并对积分滑模速度控制器进行前馈补偿,削弱系统抖振的同时提高了系统的鲁棒性。通过李雅普诺夫理论证明了该控制系统的稳定性。仿真及实验结果验证了该方法具有较强的鲁棒性,可以实现良好的跟踪效果并且无抖动。

In order to overcome the problem that the sliding mode control gain of the traditional permanent magnet synchronous motor(PMSM)is easy to generate chattering,this paper proposes a PMSM integral sliding mode control strategy based on fuzzy observer.The new sliding principle controller was designed to replace the traditional sliding mode controller with the new approach law,and it improved the dynamic response performance of the system.Combined with the characteristics of fuzzy control and adaptive control,we designed a fuzzy disturbance observer,which could be quickly and effectively observe the internal parameter changes and external disturbances of the system.The feedforward compensation was implemented for the integral sliding mode speed controller,which weakened the system chattering and improved the robustness of the system.The stability of the control system is proved by Lyapunov theory.The simulation results show that the method has strong robustness,good tracking performance and no chattering.