多通道主动隔振中的通道窜扰抑制算法

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。

Inter-channel Crosstalk Algorithm in Multichannel Active Vibration Isolation

The multi-channel active vibration isolation is to use coordination control method through multiple actuators to suppress the global system vibration. While an actuator is controlling vibration, it also interferes in other actuators, so inter-channels crosstalk is a big problem in the multi-channel active control. In this paper decoupling filters are applied to suppress inter-channels crosstalk in multi-channel active vibration. Decoupling filters are used to filter out inter-channel crosstalk signal in control error signal so that the new signal can replace control error signal as the new reference signal of the Filter-xLMS algorithm. Simulation shows that using the decoupling filter has important influence on the result of the multi-channel active control, the decoupling filter still guarantee the convergence of the algorithm when the inter-channels is positive feedback, and prevent the deterioration of control effect.