A New Fuzzy Active-disturbance Rejection Controller Applied in PMSM Position Servo System

A new fuzzy active-disturbance rejection position controller of permanent magnet synchronous motor (PMSM) servo system is presented in this paper. The improved position and speed loop controller not only maintains the original features of controller, but also reduces the adjustable parameters, which makes control performance better. Through the analysis of cross-axis output equation, a new position fuzzy active-disturbance rejection controller (Fuzzy-ADRC) scheme is proposed, ensuring the system dynamic performance, meanwhile improving the ability of the anti-load disturbance. Simulation and experimental results show that compared with classic PID control system the improved Fuzzy-ADRC system has characteristics of fast response, no overshoot and high control accuracy, and the system also has strong robustness to load and parameter changes. Besides, Fuzzy-ADRC runs steadily under high or low speed condition, which realizes higher control accuracy and stronger anti-interference of servo position control system, and makes control effect better.