电磁轴承-柔性转子系统多目标加权的主动振动控制

Vibration suppressing with mixed weight for multi-targets in active magnetic bearing-flexible rotor system

为了避免影响系数法求解出一个过大的校正力计算结果,解决由此造成的电磁力饱和以及转子悬浮失稳问题,拓展基于最小二乘法的影响系数法,提出多目标价值函数混合加权的柔性转子振动主动控制方法.利用多个目标价值函数的加权设计,不仅实现了多个节点振动之间按权值实现振动抑制,而且能够在不同量纲的振动幅值和所需电磁力之间实现权衡.算例仿真表明,提出的控制方法可以在实现转子振动控制的同时,顾及到电磁轴承(AMB)电磁力的能力极限.在转子振动能够控制在允许的范围内,适当减小对电磁力的需求,降低对电磁轴承的功率要求.

An exceedingly great magnetic force can often be required by the influence coefficient, so that themagnetic force saturating would destroy the stability of rotor levitating. A vibration suppressing methodwith mixed weight for multi-cost functions was proposed. Not only the rotor vibration can be givenattention, but also the required magnetic force is considered in the cost function. The simulation resultsindicate that the proposed method can mediate not only among a group of the target nodes vibration, butbetween the rotor vibration and the required magnetic force. The advantage of the proposed method meansthat the requirement for the magnetic force of active magnetic bearing （ AMB） can be appropriatelydecreased as long as the rotor vibration is within the allowable range. The method provides the feasibleway for the low-power control of AMB.