Abstract: A dynamics model for a whole section of the EMS maglev train was built based on MATLAB, the model described the relationship among body - levitation frame - elastic track and had four degrees of freedom. It simulated and analyzed the vehicle-track coupled vibration dynamic behavior while the vehicle passing the elastic tracks at 200 km/h, using three different kinds of control algorithms respectively. The simulation results show that under the condition of a certain speed and fixed vehicle-track physical parameters, the dynamics behaviors of body - levitation frame - track are obviously different by adopting different control algorithm, and the safety and comfort of maglev vehicle is contradict with each other. The ideal suspension controller algorithm should increase comfort as much as possible under the guarantee for safety. And at the same time, by improving the levitation controller algorithm, the dynamic performance of system in the process of coupled vibration can be enhanced. The study is valuable as reference for optimizing the maglev train levitation controller design.

Key words: maglev vehicle, vehicle-track coupled vibration, levitation controller, dynamics simulation