【摘要】 针对多频线谱振动提出一种新的主动控制方法———多通道解耦LMS自适应滤波方法。该方法以多个并行的LMS自适应滤波器结构和带通滤波器组成前馈控制器,带通滤波器对自适应滤波器进行解耦,以一个单自由度的减振器作为执行机构,对多个频率线谱振动进行主动减振。综合了LMS算法的快速性和频域自适应滤波的有效性,物理意义清晰,易于扩展。应用于国产某型机械式制冷机的主动减振,用B&K的PULSE 7700对现场调试结果进行分析,验证了该方法的有效性。更多还原

【Abstract】 A novel approach to suppress the vibration with multiple line spectra is presented.The multi-channel feedforward controller consists of multiple parallel normalized block LMS adaptive filters,each of which is combined with band-pass filters respectively to uncouple the adaptive filters.This method is as rapid as the LMS algorithm,but more effective than the frequency domain adaptive filtering method for vibration with multiple line spectra.With an SDOF actuator,vibration with multiple line spectra is effectively suppressed.This approach is applied to a mechanic cryocooler,and the effectiveness is validated by the analysis on the sampled acceleration data with PULSE 7700 of B&K.更多还原