Research on Anti-Saturation Integral Sliding Mode Control Strategy Based on Fuzzy EKF Perturbation Observation

In this paper, the built-in permanent magnet synchronous motor drive control system for electric vehicles is studied in depth with the application background of electric vehicles. Firstly, a mathematical model of the permanent magnet synchronous motor is established, and the Integral Sliding Mode Controller (ISMC) based on a new convergence law and a nonlinear integral sliding mode surface is designed to improve the system responsiveness and global robustness in response to the jitter problem of the conventional sliding mode and the integral saturation phenomenon. Second, to further improve the anti-disturbance capability of the controller, a fuzzy modified Kalman-based disturbance observer (Extended Kalman Filter (EKF)) is proposed. Simulation and experimental results show that the improved integral sliding mode control strategy based on fuzzy improved EKF perturbation observation can observe the load torque variation in real time, while improving the anti-disturbance capability, response speed and global robustness of the system.