基于跟踪滤波的自适应振动控制

针对频率周期振荡的振动系统讨论自适应控制问题，在频率跟踪的基础上对频率变化的振动响应进行控制，给出相应的估计、滤波与控制方法。首先在子空间辨识原理的基础上，通过测量信号自相关序列的递推运算获得信号频率；然后根据估计频率实时调整带通滤波器的中心频率，使其跟踪信号频率，实现信号分量的跟踪滤波；最后在LMS 方法的基础上构造

Adaptive vibration control with tracking filters

Discussed are the adaptive control of vibration of systems that are excited by forces of periodically varying frequencies.The adaptive control is realized on the basis of tracking of time-varying frequencies and a method for online frequency estimation,filtering and control is proposed. Based on the principles of subspace identification, the time-varying frequencies are first estimated from the recursively computed autocorrelation of measured signals. Then a group of bandpass filters, the center frequencies of which are equal to the estimated ones, are given to track and filter signal components. Finally, the controller is synthesized on the LMS and constructed by independent parallel control units that cancel vibrations corresponding to those components. Given as well are thesimulation and experimental results that demonstrate that the proposed method can obtain 10-25dB attenuation in vibration.