多通道主动隔振中的通道窜扰抑制算法

Inter-channel Crosstalk Algorithm in Multichannel Active Vibration Isolation

多通道主动隔振是采用多个作动器协调控制的方法抑制系统的全局振动。作动器对振动进行控制同时,也对其它作动器产生干扰,通道窜扰是多通道主动控制的一大难题。将去耦合滤波器应用到抑制多通道主动控制的通道窜扰中。用去耦合滤波器滤掉控制误差信号中的通道窜扰信号,所得信号代替控制误差作为滤波-x LMS算法新的参考信号。通过仿真表明,采用耦合滤波器对多通道主动控制结果有重要影响,去耦合滤波器在通道窜扰为正反馈时依旧保证算法收敛,防止控制效果恶化。

The multi-channel active vibration isolation is to use coordination control method through multiple actuators to suppress the global system vibration. However, when an actuator is working for vibration control, it also interferes with other actuators. So, the inter-channel crosstalk is a trouble in the multi-channel active control. In this paper, decoupling filters are applied to suppress the inter-channel crosstalk in multi-channel active vibration control. The decoupling filters can filter out the inter-channel crosstalk signal in the control error signal. Then, the obtained new signal can replace the control error signal as the new reference signal of the filter-xLMS algorithm. Simulation shows that using the decoupling filter has an important effect on the result of the multi-channel active control. And the decoupling filter can guarantee the convergence of the algorithm when the inter-channel crosstalk is a positive feedback. It can prevent the deterioration of the control effect.