Fuzzy PID Control Method of Permanent Magnetic Levitation Vehicle

The permanent magnetic suspension dust-free conveying system is introduced. According to the suspension force model and the prototype structure, a nonlinear model of the control decoupling system is established. Using the coordinate transformation decoupling strategy, four-point independent control is changed to a three-degree-of-freedom control suspension vehicle. Finally, PID control and fuzzy PID control are used to simulate the displacement step of the permanent magnet levitation vehicle with three degrees of freedom. The simulation results show that the PID controller has a faster response speed and can return to a stable position after several oscillations. The adjustment time is 0.3 seconds, but the overshoot is relatively large, about 8%. For the fuzzy PID platform, the rise time is about 0.2s, the steady-state error is about 1%, there is no overshoot, and the system has good rigidity, damping characteristics, and robustness.