Study on fuzzy control in electromagnetic suspension system based on the prediction model

The EMS is a typical unstable and nonlinear system. Applying fuzzy controller to it is getting much attention. This paper puts forward the fuzzy control on the EMS based on its prediction model, which has corrected the dynamic instability and eliminated the phenomena of the bigger overshoot or the system oscillation caused by the time-varying of the system, and by adding error weighting coefficient α to adjust the effect of the prediction model. Simulation results show that this control method can evidently correct the bad characteristics of the bigger overshoot or the system oscillation and rapidly reach the stability completely with the time-varying and the varying parameters of the system.