Model Identification and Control of Permanent Magnet Synchronous Motor Control System

In this paper, a type of H∞ control based on mixed sensitivity function for permanent magnet synchronous motor (PMSM) is proposed. Firstly, the parameters and input position of excitation signal is determined based on the analysis of PMSM control system. Secondly, the order of PMSM control system model is identified using the Hankel matrix identification method. Finally, the H∞ speed controller is designed according to the requirements of tracking and robustness. Compared with PID controller on the experimental platform, the designed H∞ controller has shorter speed adjustment time, smaller overshoot response and stronger robustness.