亥姆霍兹消声器自适应控制方法研究  

Research on adaptive control method of Helmholtz muffler

作　　者：安君 吕海峰[1] 陈鹏 袁晓红 AN Jun;LYU Hai-feng;CHEN Peng;YUAN Xiao-hong(North University of China,School of Mechanical Engineering,Shanxi,Taiyuan 030051,China)

机构地区：[1]中北大学机械工程学院,山西太原030051

出　　处：《声学技术》2019年第2期188-193,共6页Technical Acoustics

基　　金：国家青年科学基金项目(51305409);山西省青年科技研究基金项目(2013021020-2);山西省高等学校优秀青年学术带头人支持计划;山西省131工程领军人才支持计划

摘　　要：为弥补传统亥姆霍兹消声器消声频带较窄,无法适应噪声频率多变的实际环境的缺点,提出了一种具有自适应调节功能的亥姆霍兹消声器。采用步进电机与曲柄连杆驱动亥姆霍兹消声器腔体的背板移动,从而改变消声频率;利用MATLAB软件进行了数值分析,获得了最优结构;基于LabVIEW软件进行自主降噪控制编程。实验结果表明,当噪声频率从385 Hz变化到860 Hz时,所设计的消声器可以实时调节腔体体积,实现有效消声,且降噪量最高可达24 dB。与传统消声器相比,自适应亥姆霍兹消声器不仅实现了有效消声,而且实现了自适应频率可调,消声能力得到了显著改善。In order to remedy the shortcoming of the traditional Helmholtz muffler in having narrow noise elimination frequency band,which makes it unable to adapt to the actual environment with changeable noise frequency,a kind of Helmholtz muffler with adaptive adjustment function is proposed in this paper.A stepping motor and a crank link are used for driving the backboard of Helmholtz muffler cavity to change the noise elimination frequency.The numerical analysis is carried out by using MATLAB software and the optimal structure is obtained.The independent noise reduction control programming is carried out based on LabVIEW.Experimental results show that when the noise frequency changes from 385 Hz to 860 Hz,the designed muffler can adjust the volume of the cavity in real time,and achieve the effective noise elimination with a maximum noise reduction of 24 dB.Compared with the traditional muffler,the adaptive Helmholtz muffler not only realizes the effective noise elimination,but also realizes the adaptive frequency adjustable,and the noise elimination ability is significantly improved.

关 键 词：亥姆霍兹消声器 数值分析 LABVIEW软件 自适应 

分 类 号：TB535.2[理学—物理]