基于模糊趋近律和扰动观测器的PMSM滑模控制

Sliding Mode Control of Permanent Magnet Synchronous Motor Based on Fuzzy Reaching Law and Disturbance Observer

为了提高永磁同步电机调速系统的响应精度、速度、鲁棒性,解决传统滑模控制中趋于滑模面时间与系统抖振相矛盾的问题,提出了一种基于模糊趋近律和扰动观测器的滑模控制。模糊趋近律根据系统轨迹与滑模切换面的距离来有效地调整切换增益的大小,扰动观测器估计系统的内部参数变化和外部负载干扰,将估计值前馈补偿到速度控制器。仿真结果表明,系统快速跟踪阶跃信号,响应速度加快,系统出现扰动时,电机转速波动极小,迅速恢复稳定时间,结果表明采用基于模糊趋近律和扰动观测器的滑模控制方法能够有效地增强调速系统的鲁棒性和动态性能,并抑制系统的抖振。

To improve the speed response accuracy and durability of the PMSM speed control system and resolve the conflict between the time of glide state surface and the system jitter in traditional glide mode control,offering statutory slip state control,vague approximation and interference observer.The vague law of estimation effectively adjusts the size of the switch gain according to the distance between the path of the system and the sliding shift surface,and the interference observer evaluates changes in internal parameters and interference with the external load of the system,compensating for the approximate value entered forward to the speed controller.The simulation results show that the system tracks the step signal quickly,the response speed is accelerated,and when the system is disturbed,the motor speed fluctuation is extremely small,and the stability time is quickly restored,and the above results show that the sliding control method based on the fuzzy reaching law and the interference observer can effectively improve the reliability and dynamic performance of the control system and suppress the jitter of the system.