针对多振源密频及波动线谱主动控制的改进算法及试验

Improved algorithm and experiments for active control of dense and fluctuating frequency sinusoidal vibration induced by multi-sources

为了让船舶机械主动隔振装置在线谱频率波动和多振源密频耦合等实船复杂工况下,仍能取得良好的振动线谱主动控制效果,研究了以多通道窄带Fx-Newton算法为基础的改进算法,提出了窄带滤波相位失真的自适应补偿器,使控制算法对线谱频率波动具有高鲁棒性;研究了多参考信号Fx-Newton算法,从多振源分离提取互不相关的多参考信号,从而解决多振源密频线谱控制难题。实验结果表明,改进窄带Fx-Newton算法对频率波动线谱的主动控制效果良好,并且对两个激振器或两台空压机组激励出的密频波动线谱也能进行稳定、高效的主动控制。

In order to achieve good active control effect of fluctuating-frequency and dense-frequency sinusoidal vibration induced by multi-sources which may occur in active-passive vibration isolation devices of marine machineries,the improved algorithm based on multi-channel narrowband Fx-Newton algorithm was studied.The algorithm with adaptive compensator for narrowband filter phase distortion was proposed,which can obtain high robustness for fluctuating-frequency sinusoidal vibration.Next,the multi-reference Fx-Newton algorithm was proposed to control dense-frequency multiple sinusoids in the same narrowband,under the precondition of acquiring multiple independent reference signals from vibration sources.The active control experiments show that the improved narrowband Fx-Newton algorithm can get good control effect on the fluctuating-frequency sinusoidal vibration,and can achieve stable and efficient control on the fluctuating dense-frequency sinusoidal vibration excited by two exciters or two air compressors.