H_∞控制理论在管道降噪中的仿真实验研究  

The simulation of duct noise reduction based on H_∞ control theory

作　　者：栾晓锐[1] 陈端石[1] 孙旭[1] 

机构地区：[1]上海交通大学动力与能源工程学院,200030

出　　处：《噪声与振动控制》2001年第3期2-5,共4页Noise and Vibration Control

摘　　要：本文运用H∞ 控制理论建立管道内一维声场的前馈式噪声主动控制模型 ,将前馈控制器设计问题转化为标准的H∞ 控制问题。为有效地消减次级声场对参考传声器的声反馈影响 ,声反馈通道被融合于控制器的设计过程中 ,以保证ANC系统的稳定性和降噪效果。计算机仿真结果表明 ,该系统能够稳定运行 ,并且可有效地降低截止频率以下频段的噪声 。Based on H ∞ control theory,the feedforward Active Noise Control (ANC)model of one dimensional sound field in a duct is presented.The design problem of feedforward controller is transformed into the standard problem of H ∞ control.To eliminate the influence of acoustic feedback of secondary sound field on reference microphone,the acoustic feedback channel has been integrated in the controller design,and so that the stability and noise reduction performance of ANC system is guarantied.By computer simulation it is shown that the system proposed in this paper is runing with stability,reduces the niose under cut off frequency,and a significant noise reduction has been gained in assigned frequency band.

关 键 词：H∞控制 噪声 主动控制 频域整形 管道 降噪 计算机仿真 前馈控制器 设计 

分 类 号：TB535.2[理学—物理] TP391.9[理学—声学]