磁力轴承转子系统非线性支承特性的研究  

Study on Nonlinear Bearing Characteristics of an Active Magnetic Bearing-rotor System

作　　者：刘明尧[1] 胡业发[1] 周祖德[1] 

机构地区：[1]武汉理工大学

出　　处：《中国机械工程》2005年第15期1377-1379,共3页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50175084);国家重点基础研究发展规划资助项目(国科基字[2001]50号)

摘　　要：通过对磁力轴承非线性支承力特性的分析,可以看出控制器参数与支承特性之间有非常强的非线性耦合关系。虽然其支承的刚度和阻尼都能够通过改变控制器参数进行调整,但控制器参数的选择受非线性因素的影响较大。当比例增益越大,则在转子平衡点处的线性刚度就越大,能提供的最大支承力也越大,但支承实现正刚度的转子位移区间越小,系统稳定的转子位移区间就越小。通过对主动磁力轴承转子系统非线性支承特性的研究,揭示了控制器结构参数、机械结构参数与支承特性之间的耦合关系。By analyzing the nonlinear bearing forces of an active magnetic bearing, it can be seen that there is strong nonlinear coupling relation between the bearing characteristics and the controller parameters. Although＇the bearing stiffness and damping can be changed by varying the controller parameters,selection of the controller parameters was strongly affected. With increasing proportional gain the bearing stiffness increases at the point of rotor balance and rotor displacement region with positive stiffness decreases,the rotor stable displacement region decreases. Therefore by the study of nonlinear bearing characteristics of a AMB-rotor system,the coupling relations among controller parameters, mechanical structure and bearing characteristics are revealed.

关 键 词：磁力轴承转子系统 非线性特性 刚度 阻尼 

分 类 号：TH133.3[机械工程—机械制造及自动化]