Double Fuzzy PID Control in PMLSM Variable Theory Research

Abstract

Aiming at the undesirable characteristics of permanent magnet synchronous linear motor (PMLSM) in the process of movement, such as parameters easy to change, easy to be interfered by sudden load changes, nonlinearity, strong coupling, etc., the fuzzy control idea of variable theory domain is introduced on the premise of the mathematical model of magnetic field oriented permanent magnet synchronous linear motor. This paper constructs the input fuzzy domain expansion factor rule table, uses the fuzzy rules to adjust the expansion factor in real time, changes the fuzzy PID control input fuzzy domain, and realizes the proportional, integral, and differential parameter self-adjustment. The experiments are simulated by MATLAB, and the research results show that the dynamic response speed and robustness of the double fuzzy variable theory domain PID control system are improved compared with the traditional fuzzy PID control and the triple fuzzy variable theory domain PID control.