The Motion of the Rotor Acrossing Critical Speed Levitated by AMBs with Anisotropic Stiffness

摘要：

　　The stiffness and damping ratios in x and y radial degrees of freedom(DOF)of active magnetic bearing(AMB)may be different due to the machining and assembly errors.Therefore,the critical speeds in the two radial DOFs will not be equal.To study the rotor motion when its speed is between the two unequal radial critical speeds,a model of a rigid Jeffcott rotor levitated by AMBs with anisotropic bearing stiffness and damping ratio was built in this paper.The differential equation of motion of the model was derived from Lagrange equation firstly.Then the motion of the rotor geometric center was given.Through plotting the orbit of the rotor geometric center,it is found that the backward whirling movement of the rotor can be observed when the product of the damping ratios in x and y DOFs is lower than a critical value.

作者: Hongwei LI Jing TIAN Yixin SU Wentao YU Suyuan YU

作者单位: School of Electrical Engineering,Shandong University,No.17923,Jingshi Road,Jinan,Shandong,China Center of Combustion Energy,Tsinghua University,Beijing,China

会议类型: 国际会议

会议名称: the 16th International Symposium on Magnetic Bearings (第十六届国际磁悬浮轴承大会) (ISMB6)

会议地点: 北京

会议语种:英文

页码: 1-4

在线出版日期: 2018-08-13（万方平台首次上网日期，不代表论文的发表时间）