Synchronous vibration is a major obstacle to the stable operation of rotating machineries. In previous studies, active control methods were developed to compensate for synchronous vibration using actuators, such as an active magnetic bearing or a piezo actuator. Adaptive feedforward cancellation is another well-known control method and is used to compensate for the synchronous vibration in the actual system. The control methods can compensate for the synchronous vibration; however, the amplitude of the vibration in other frequency ranges can be increased by the waterbed effect due to Bode’s integral theorem. Therefore, there is a trade-off between the compensation of the synchronous vibration and the negative impact of other vibration. In this article, a novel control scheme for the adaptive feedforward cancellation is proposed to eliminate the negative impact due to the waterbed effect. The proposed method controlled the input signal of the adaptive algorithm in the adaptive feedforward cancellation and realized an ideal feedforward controller worked independently from the feedback loop. The effectiveness of this method was verified experimentally using a test rig.

同步振动是旋转机械稳定运行的主要障碍。在以前的研究中，已经开发出主动控制方法来补偿使用执行器（例如主动电磁轴承或压电执行器）的同步振动。自适应前馈消除是另一种众所周知的控制方法，用于补偿实际系统中的同步振动。该控制方法可以补偿同步振动。然而，由于博德积分定理，水床效应可增加其他频率范围内的振动幅度。因此，在同步振动的补偿与其他振动的负面影响之间需要权衡。在这篇文章中，提出了一种新的自适应前馈抵消控制方案，以消除水床效应带来的负面影响。该方法控制了自适应前馈抵消中自适应算法的输入信号，实现了独立于反馈回路的理想前馈控制器。使用试验台通过实验验证了该方法的有效性。