Pre-Fuzzy-PID Controller for Effective Control of Electromagnetic Levitation System

This paper proposes an effective control solution to achieve stabilizing control and tracking control with robustness against high valued disturbances in the area of Electromagnetic Levitation System (EMLS). EMLS is an open loop unstable and nonlinear test bench with input and state types of nonlinearities presents in the current control mode. Fuzzy-PID controller is designed and implement based on ITAE performance criterion to achieve satisfactory transient as well as steady state performance from EMLS. Pre-filter structure is added to smooth the system performance as well as to reduce the transient overshoot problem. The simulation results and different integral errors like ISE, ITAE and ISTE are presented to validate the effectiveness of the proposed research work under different initial conditions, various trajectories and different disturbances.