The Levitation Controller Design of an Electromagnetic Suspension Vehicle using Gain Scheduled Control

초록

Maglev vehicles constitute a new class of transport systems that has been constantly developed and improved to become a new alternative of comfortable and secure transport. These vehicles have suspension, propulsion and guidance systems based on magnetic forces. Electromagnetic suspension vehicle systems are highly nonlinear and essentially unstable systems. Levitation of an electromagnetically levitated vehicle prototype can be accomplished with the action of attraction forces produced by electromagnets. This paper describes a robust controller design method of electromagnetic suspension systems using gain scheduled control. For achieving the levitation control of the DC electromagnetic suspension system, we considered gain scheduling method. The proposed gain scheduling is based on linear quadratic Gaussian(LQG) and continuous Kalman estimator for widely varying nonlinear and parameter dependent dynamic system. Simulation results show that the proposed gain scheduling method based on LQG and continuous Kalman filter methodology robustly yields uniform performance with adequate gap response over the mass variation range.