Sliding Mode Control of Permanent Magnet Synchronous Motor Based on Fuzzy Reaching Law and Disturbance Observer
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 for-ward 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 dy-namic performance of the control system and suppress the jitter of the system.
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