Page 125 - 《应用声学》2020年第4期

第 39 卷 第 4 期 Vol. 39, No. 4
2020 年 7 月 Journal of Applied Acoustics July, 2020

⋄ 研究报告 ⋄

一种能量比调控的有源噪声控制算法 ∗

肖梦迪 陈卫松 † 钱隆彦 吴 慧

(安徽师范大学物理与电子信息学院 芜湖 241000)

摘要：在前馈有源噪声控制系统中，建模信号与控制信号相互影响，建模信号的引入会导致系统降噪性能变
差。为了减小建模信号的影响，提出一种基于能量比调控的次级通道在线建模有源噪声控制算法。利用控制
过程与建模过程的误差能量比构造步长调控函数，分别调节控制过程与建模过程的步长值，从而减弱两者的
相互影响。在次级通道建模过程中，对建模步长值采取分段调控的方法，并通过建模步长值的变化来调节建模
信号，从而提升系统降噪性能。仿真结果表明，对于低频噪声信号的有源噪声控制，相比已有算法，提出的算法
能获得较快的建模收敛速度和较高的降噪量。
关键词：有源噪声控制；能量比；步长值；次级通道在线建模
中图法分类号: TN912.35 文献标识码: A 文章编号: 1000-310X(2020)04-0611-07
DOI: 10.11684/j.issn.1000-310X.2020.04.015

An algorithm of energy ratio for the active noise control system

XIAO Mengdi CHEN Weisong QIAN Longyan WU Hui

(College of Physics and Electronic Information, Anhui Normal University, Wuhu 241000, China)

Abstract: In the feed-forward active noise control system, the modeling signal and the control signal influence
each other. The signal will deteriorate the noise reduction performance of the system. In order to reduce the
influence of modeling signal, an online modeling active noise control algorithm for secondary path based on
energy ratio regulation is proposed. The step size function is constructed by using the error energy ratio of
the control process and the modeling process. The step sizes of control and modeling are adjusted respectively
to reduce the interaction between them. In the process of secondary path modeling, the segmentation control
method is adopted for the modeling step value. The modeling signal is adjusted by changing the step size of
the model, so as to improve the noise reduction performance of the system. The simulation results show that
for the active noise control of low frequency noise signals, the proposed algorithm can achieve faster modeling
convergence speed and higher noise reduction than the existing algorithms.
Keywords: Active noise control; Energy ratio; Step size; Online secondary path modeling

2019-10-31 收稿; 2020-02-24 定稿
国家自然科学基金青年基金项目 (61601005), 安徽省自然科学基金面上项目 (1808085MF164)
∗
作者简介: 肖梦迪 (1995– ), 女, 安徽阜阳人, 硕士研究生, 研究方向: 有源噪声控制。
通信作者 E-mail: chen2711@mail.ahnu.edu.cn
†