Influence of Flexible Support Parameters Between Moving Base and Ground on Dynamic Characteristics of Maglev Rotor

Abstract With the expansion of the industrial applications of magnetic bearings, in many scenarios, the installation base of magnetic bearings is not rigid. That is, there is a flexible support relationship between the supporting base of the magnetic bearing and the ground. In this case, the installation base of the magnetic bearing will move under the influence of external excitation or rotor motion, which in turn affects the dynamic characteristics of the maglev rotor (magnetic levitation rotor). At present, most studies assume that the supporting base is rigid or only the base's motion relative to the ground is considered, ignoring the flexible support relationship between them. However, for the base flexible support, the influence of base support parameters and external base excitation on the dynamic characteristics of the maglev rotor remains to be studied. This article establishes a dynamic model of the maglev rotor with base flexible support. Through numerical simulations and experiments, it investigates the rotor's dynamic characteristics under different base support parameters, as well as the influence of these parameters on the rotor's dynamic response when the base is subjected to external disturbances. The research results indicate that properly increasing the base mass and base support damping while reducing the base support stiffness can effectively improve the rotor's levitation accuracy, enhance system stability, and mitigate the impact of external base disturbances on the system. This study can provide a reference for expanding the industrial application scenarios of maglev rotors and their vibration and noise control.