电磁轴承实现振动姿态解耦的转子不平衡抑制

摘要

For purpose of suppressing unbalance vibration of electromagnetic bearing-rotor system and improving the rotating precision,an unbalance suppression method of vibration attitude decoupling of rotor by adopting electromagnetic bearing was proposed.The working principle of this method is to obtain the centroid axial position of rotor by means of vibration identification,then perform translational and conical decoupling of vibration attitude of rotor according to the centroid axial position, and generate fine compensation force and compensating couple of electromagnetic bearings by means of iterative search,to realize independent control of translation and conical motion of rotor vibration. Time-domain and frequency-domain analyses were made on vibration signal before and after control via control performance testing experiment,and the results show that that the rotor axis trajectory obviously converges to the center and the vibration energy of rotational frequency significantly decreases.This indicates that the method is effective to suppress unbalance vibration of rotor system supported.%为了抑制电磁轴承-转子系统的不平衡振动,提高旋转精度,提出了一种采用电磁轴承的转子振动姿态解耦的不平衡抑制方法.该方法首先通过振动识别获取转子的质心轴向位置,然后根据质心轴向位置对转子振动姿态进行平动和锥动解耦,最后以自适应迭代搜索的方式生成电磁轴承的精确补偿力和补偿力偶,对转子振动的平动和锥动实现独立控制.通过控制性能测试实验,对控制前后的振动信号进行了时域和频域分析,结果显示:转子轴心轨迹明显向中心收拢,转速频率的振动能量显著下降.这表明该方法能够有效抑制转子不平衡振动.