一种改进的基于频率调节的自适应多线谱控制算法及其试验研究

摘要

针对一种传统的基于频率调节的线谱自适应FXRLS控制算法进行了分析。首先，提出了改进的线谱控制方法；然后，通过分析其基于参考信号生成的频率调节结构，提出了改进措施，形成了改进的基于频率调节的自适应FXRLS线谱控制方法。仿真分析表明：相比原算法，改进算法的参考信号估计频率收敛更加精确，具有更好的稳态性能。同时，经双层隔振平台线谱控制试验表明：改进后的算法能够在线谱信号精确频率未知的情况下，对线谱进行有效的振动抑制。%Analysis of an adaptive FXRLS active control algorithm for vibration with multi-spectra is conduc-ted.Firstly,an improved algorithm is proposed.Then,the frequency tuner based on reference signal synthe-sizer is analyzed.An improved FXRLS algorithm for multi-spectra with the modified technique is proposed on the basis of the analysis.Comparisons of two algorithms demonstrate that the original algorithm is a simplifi-cation of the modified algorithm.Amplitude of synthesized reference signal is set as a constant to improve the performance.Simulation validates that the improved algorithm has better performance at steady state com-pared with the original algorithm.Experiments based on two stage isolation system also show that the im-proved algorithm could suppress the vibration with multi-spectra effectively when the precise frequency is un-known.