MA Li xin1, FAN Hong cheng1, HUANG Yang long1, YAO Peng2

 

(1. Department of Electrical Engineering School of Optical Electrical and Computer Engineering, University of 

 

Shanghai for Science & Technology, Shanghai 200093, China; 2. Shanghai Motor System Energy Saving 

 

Engineering Technology Research Center Co., Ltd., Shanghai 200333, China)

 

 

Abstract: Aiming at the problems that the interference can′t be restrained by the traditional PID control strategy and some intelligent control methods are too complex to be calculated ,established and applied, based on the analysis of fuzzy theory and two degreeof reedom(2 DOF) principle, an easy way was proposed to realize feedforward fuzzy 2 DOF control strategy. Feedforward 2 DOF model abbreviation transformation makes it have a combination of fuzzy control and the advantages of 2 DOF control,which helps achieve real time tracking and auto tuning function after the transformation model on the basis of introducing the fuzzy control rules. The feedforward fuzzy 2 DOF control system simulation model was established with the help of Matlab. The results indicate that the system realizes without overshoot, besides, its response speed and disturbance recovery time double the conventional PID control. The feedforward fuzzy 2 DOF control strategy achieves the permanent magnet synchronous motor(PMSM) servo system of high speed and strong anti interference ability, and improves the dynamic and static performance and control precision. It provides a feasible and easy way to realize the control strategy for solving the high precision numerical control system.

 

Key words: PMSM servo system; feedforward fuzzy 2 DOF; real time tracking; auto tuning