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

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。

Field Balancing for Magnetically Suspended Rigid Rotor Based on Magnetic Force Equivalence Principle

 A field balancing method was proposed to solve rotor unbalance vibration problems in the Magnetically Suspended Flywheel (MSFW). Based on the equivalence principle between magnetic control force and unbalance centrifugal force, the rotor unbalance can be calculated and corrected by measuring the magnetic force. A zero-displacement controller was designed to make the rotor rotate around its geometric axis. Then the magnetic force was obtained by measuring the control current since the magnetic force was a linear function of the control current. This method eliminates the errors introduced by the oversimplification of dynamic model in conventional methods and is applicable especially for the high-gyroscopic-effect-pancake magnetically suspended rigid rotor. The experiment results demonstrate the method is effective to improve the balancing accuracy for the magnetically suspended rigid rotor system.