电磁力参数自寻优的转子多频振动主动抑制

Active suppression of multi-frequency vibration of rotor-bearing system through self-optimizing control

提出一种转子多频振动的在线主动抑制方法,该方法利用电磁作动器向转子施加多个与转子振动频率相匹配的旋转电磁力,通过在线自寻优的方式确定电磁作动器的控制电流相位和幅值,使施加的多个频率成分的旋转电磁力能够削减转子的多频振动幅值,实现转子系统的多频振动在线抑制。首先建立了转子-轴承-电磁作动器系统动力学模型;提出一种转子系统多频振动的主动抑制方法,对该方法的有效性和可行性进行了理论推导;建立了电磁作动器控制电流相位和幅值的寻优模型,提出一种控制电流相位的整周寻优策略;随后搭建实验装置,进行了实验研究,理论推导和实验结果均表明该方法能够实现转子的多个频率成分振动的主动抑制。

An approach was proposed for the suppression of multi-frequency periodic vibration of rotor-beating system with electromagnetic exciters through self-optimizing control. A control strategy optimizing the amplitudes and phases of the control signals was presented by using an on-line control forces generated by electromagnetic exciters to reduce bearing system with electromagnetic exciters was established self-optimizing algorithm and applying multiple frequency the vibration amplitudes of the rotor. A model of rotor- and an active vibration control scheme for controlling transverse vibration of the rotor under multi-frequency excitation was designed. A whole circle search algorithm about the phase of control current was proposed. The experiments for controlling multi-frequency vibration of the rotor were carried out on a rotor-beating test rig. The experiment results indicate that the proposed method is effective in reducing the rotor vibration caused by multi-frequency forces.