基于信号生成的多线谱振动控制方法

Study on control algorithm based on signal generator for vibration with multi-spectra

针对实际振动主动控制中,线谱振动信号与参考信号的频率差异造成自适应前馈式线谱振动主动控制方法的性能下降这一问题,进行了基于参考信号生成的线谱振动主动控制方法的研究.在线谱振动主动控制方法中,结合一种参考信号波形生成器,并通过带通跟踪滤波器对残余振动信号进行滤波,将各个频率的残余振动信号分量进行分离,提出了一种基于参考信号波形生成器的线谱振动主动控制方法,并对该方法的稳定性和收敛性进行了分析.仿真结果表明:带通滤波器提高了该线谱振动主动控制方法的收敛性能.基于双层隔振平台的线谱振动主动控制实验表明该方法能够在参考信号频率与线谱振源信号频率存在偏差时取得良好的振动抑制效果.

Performance of adaptive feed forward control algorithm for vibration with multi‐spectra may degrade due to the frequency error between the reference signal and vibration source in practical imple‐mentation .In order to tackle this problem ,a study on active vibration control algorithm based on ref‐erence waveform generators was engaged .Reference waveform generators were introduced in the ac‐tive vibration control algorithm .The measured residual error signal was split into individual error component by tracking bandpass filter bank .Then ,stability and convergence property of the algo‐rithm were explored .Simulation results show that convergence rate of the algorithm is improved by u‐sing the bandpass filter .Experiment based on a two‐stage isolation system validate that the algorithm can achieve good performance when the frequency error exists .