基于Fu-LMS算法的前馈式噪声主动控制系统研究  

Research on Feed-forward Noise Active Control System Based on Fu-LMS Algorithm

作　　者：高永升 李忠利 杨淑君 陈修魁 刘小锋 GAO Yong-sheng;LI Zhong-li;YANG Shu-jun;CHEN Xiu-kui;LIU Xiao-feng(Vehicle and Transportation Engineering Institute,Luoyang University of Science and Technology,Luoyang 471000,China)

机构地区：[1]河南科技大学车辆与交通工程学院,河南洛阳471000

出　　处：《仪表技术与传感器》2021年第3期112-116,共5页Instrument Technique and Sensor

基　　金：国家科技部专项资助项目(2017YFD0700304-02)。

摘　　要：声反馈的存在,使前馈式控制系统传递函数引入了新的极点。传统的基于Fx-LMS算法的前馈式控制系统利用系数很长的滤波器来模拟极点位置,这导致系统计算量增多并且效果不理想。针对这一问题,构建了一种基于Fu-LMS算法的控制系统。该系统控制的滤波器具有可变极点,利用这一结构特点可以精确模拟实际物理系统的传递函数,系统计算量更少。利用MATLAB与Simulink建立模型,分析两种系统降噪效果,并且基于DSP实验平台实现了系统设计。实验结果表明,设计的主动控制系统有很好的降噪效果。With the existence of acoustic feedback,a new pole was introduced into the transfer function of feedforward control system.The traditional feedforward control system based on the Fx-LMS algorithm needs to use a filter with a very long coefficient to simulate the pole position,which leads to increase in calculation and poor performance.Concerning this issue,a control method based on Fu-LMS algorithm was constructed.The filter controlled by this system has variable poles,the transfer function of real physical system can be accurately simulated by using this structure characteristic which can achieve less computation.MATLAB and Simulink were used to establish models to analyze the noise reduction effects of the two systems,and the two systems were designed based on DSP test platform.The experimental results show that the system has good noise reduction effect.

关 键 词：Fu-LMS 声反馈 滤波器 极点 自适应前馈式噪声控制系统 

分 类 号：TB535[理学—物理]