基于磁力等效原理的刚性磁悬浮转子系统高精度在线动平衡  

Field balancing for a magnetically suspended rigid rotor based on magnetic forces equivalence principle

作　　者：刘超[1,2,3] 刘刚[1,2,3] 盖玉欢[1,2,3] 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]北京航空航天大学惯性技术重点实验室,北京100191 [3]北京航空航天大学新型惯性仪表与导航系统技术国防重点学科实验室,北京100191

出　　处：《振动与冲击》2016年第4期67-71,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金(61374029)

摘　　要：针对磁悬浮飞轮转子不平衡振动问题,提出了一种在线动平衡方法。其基于磁轴承控制作用力与转子不平衡离心力之间的等效原理,通过检测磁轴承的控制作用力解算转子不平衡校正质量。设计了零位移控制器,使转子绕几何轴旋转,此时磁轴承的控制作用力与控制电流呈线性关系,通过测量控制电流来准确获得磁轴承的控制作用力。该方法消除了传统方法由动力学模型过度简化带来的误差,尤其适用于强陀螺效应的扁平型刚性磁悬浮转子系统。实验验证了该方法的有效性,对提高磁悬浮转子系统的动平衡精度具有实际意义。A field balancing method was proposed to solve rotor unbalance vibration problems in a magnetically suspended flywheel（ MSFW）. Based on the equivalence principle between magnetic control force and unbalance centrifugal force,the rotor unbalance was calculated and corrected by measuring the magnetic forces. A zero-displacement controller was designed to make a rotor rotate around its geometric axis. Then the controlling force of the magnetic bearing was obtained by measuring the control current since the former was a linear function of the latter. This method eliminated the errors introduced by the oversimplification of dynamic model in conventional methods and it was especially applicable for a high-gyroscopic-effect-pancake magnetically suspended rigid rotor. The experiment results demonstrated that the method is effective to improve the balancing accuracy for a magnetically suspended rigid rotor system.

关 键 词：刚性转子 主动磁轴承 不平衡振动 在线动平衡 

分 类 号：TH133.7[机械工程—机械制造及自动化]