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中文摘要：
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。
英文摘要：
Analysis of an adaptive FXRLS active control algorithm for vibration with multi-spectra is conducted.Firstly,an improved algorithm is proposed.Then,the frequency tuner based on reference signal synthesizer 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 simplification 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 compared with the original algorithm.Experiments based on two stage isolation system also show that the improved algorithm could suppress the vibration with multi-spectra effectively when the precise frequency is unknown.
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