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Dynamic modeling of electromagnetic suspension system

Characteristics of magnetic-levitation systems are studied using dynamic models that include motion-dependent lift, drag, slip, and roll motions. The contact constraint between the vehicle and the track is modeled using a compliant contact model, and inelastic restitution is modeled using damping. Unknown numerical parameters are identified using an optimization technique and experimental data. The numerical tests are focused on the damping characteristics, stability in lifting and slip motions, the lifting efficiency, and the contact behavior with the track. It turns out that the suspension system does not have any inherent damping in the lifting direction. However, a stable behavior is observed in the traveling direction. The model also shows that the system has a strong concentric force that stabilizes the vehicle in the slip motion as well as in the rolling motion.