Dynamic Modeling and Control of Nonlinear Electromagnetic Suspension Systems

In order to improve the research of dynamic behavior and control algorithm of the electromagnetic suspension (EMS) system of the MAGLEV train, further increasing the pertinence and the precision of the research, this paper describes the electromagnet-guideway coupling dynamic system composed of the single electromagnet and Bernoulli-Euler Beam and obtains non-linear mathematical model. Hurwitz stability criterion is utilized to prove the open-loop instability of the coupling system. The vibration information of the guideway is input into the designed controller and involved in the calculation of the control law. Simulation results show the proposed controller can realize stable suspension of the electromagnet and eliminate the vibration of the guideway, which can reduce the exacting requirements of system stability on the guideway properties. Moreover, the coupling system with the proposed controller shows better dynamic response characteristics.