Abstract
This paper proposes a new Electro-Magnetic-Suspension (EMS) system which has the ability of banking in curve section, a dynamic damper vibration control system made by a pendulum and a new rotary vibration control system made by a rotor with active control to improve the damping effect of the EMS system in tilting motion. This new EMS system can tilt automatically corresponding to the magnitude of the centrifugal force, and cancel the constant disturbance forces in five directions only with the attraction forces of permanent magnets and the gravity of earth. Four hybrid-magnets are used to guide and suspend a vehicle at the same time, that is different to a conventional EMS system getting necessary force from a guidance system when running on sharp curve. But in the EMS system, the damping in tilting motion is so small that any disturbance will make the vehicle oscillation without friction. The new rotary vibration control system is applied to solve the vibration problem of the self-banking EMS system. In the rotary vibration control system, the authors use the reaction torque caused by driving the rotor to make a rotary skyhook damper for absorbing the tilting vibration of the EMS system. In order to avoid the trouble of the vibration control system cause the failure of the EMS system in stabilizing control for floating, the two control systems are designed in independent. The Nearly-Zero-Power control method is applied to stabilize EMS system with minimum energy consumption of the hybrid-magnets. The results of experiment and simulation verified the capabilities of the self-bank EMS system and the vibration control method proposed in this paper.
