Vibration Characterization of Permanent Magnet Levitation Vehicle System Based on Permanent Magnetic Track Relationships

Permanent magnetic levitation (PML) is an innovative levitated transportation system. Examining the dynamic response of PML vehicles based on their permanent magnetic track relationship is crucial for assessing system stability and safety. In this regard, this study first established the multibody dynamic equations of PML vehicles according to their magnetic trajectory relationship. A coupled dynamic model was then developed within the Simulink environment; finally, the dynamic characteristics of the PML vehicle engineering machine were analyzed. The simulation results were in good agreement with the experimental results, further verifying the accuracy and reliability of the dynamic model. The results show that the bogie keeps a certain attitude for a long time at a low speed. The vibration acceleration of the bogie and body was much smaller than the corresponding dynamic evaluation criteria. Notably, the spectral analysis of the vertical vibration acceleration of the body shows that the axis distance of the PML, lateral and axial distances of the second suspension system, and lateral distance of the guide wheels have a significant effect on the body vibration. This study provides a relevant reference for the engineering application of PML vehicles.