变步长CFxLMS算法及其在电梯噪声主动控制中的仿真  

CFxLMS Algorithm with Variable Step Size and its Application to Simulation of Elevator Cabin Noise Active Control

作　　者：马英博 吴亚锋[1] 杨鑫博 MA Yingbo;WU Yafeng;YANG Xinbo(School of Power and Energy,Northwestern Polytechnical University,Xi’an 710129,China)

机构地区：[1]西北工业大学动力与能源学院,西安710129

出　　处：《噪声与振动控制》2018年第5期57-61,共5页Noise and Vibration Control

摘　　要：提出一种改进的CFxLMS(Correlation FxLMS)算法,该算法使用滤波参考信号与误差信号的相关函数控制步长更新。即随着相关函数的减小,步长也逐渐减小,从而提高了算法的实时性,较好地解决了传统FxLMS算法因步长固定带来的稳态误差大和实时跟踪能力弱的问题。为进一步验证改进算法的性能,将CFxLMS算法应用于高速电梯的轿厢内噪声主动降噪仿真中,并与FxLMS算法的结果进行对比。A modified CFxLMS(Correlation FxLMS)algorithm is proposed.In this algorithm,the correlation function of the filtered reference-error signal is used to control the step size updating.The step size decreases with the decrease of the correlation function,thereby the real-time capability of the algorithm is improved,and the inherent contradiction of the FxLMS algorithm between convergence speed and stable error is overcome.For further verification,the CFxLMS algorithm is applied to active noise control of high speed elevator cabins.Simulation results are compared with the results of the FxLMS algorithm.

关 键 词：声学 主动噪声控制 变步长 CORRELATION FxLMS(CFxLMS)算法 电梯噪声 仿真计算 

分 类 号：TB535[理学—物理]