Farfield and nearfield source identification for machine tools using Microphone array imaging systems

被引:3
|
作者
Bai, Mingsian R. [1 ]
Chen, Ching-Cheng [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Power Mech Engn, Hsinchu 30013, Taiwan
关键词
Machine tools; Delay-And-Sum; Minimum variance distortionless response; Multiple signal classification and Equivalent source method;
D O I
10.1016/j.proeng.2014.06.354
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Farfield and nearfield microphone arrays are proposed for noise source identification (NSI) and sound field visualization (SFV). Farfield acoustic imaging algorithms including the delay and sum (DAS) algorithm, the minimum variance distortionless response (MVDR) algorithm and the multiple signal classification (MUSIC) algorithm are employed to estimate direction of arrival (DOA). Results demonstrate that the MUSIC algorithm can attain the highest resolution of localizing sound sources positions. In the nearfield array signal processing, one formulation termed the indirect equivalent source model (ESM)-based nearfield acoustical holography (NAH) is derived from discretizing the simple layer potential. As indicated by the experimental results, the proposed technique proved effective in identifying the noise sources from various machine tools such as milling machine, turning lathe and shearing machine. (C) 2014 Elsevier Ltd.
引用
收藏
页码:345 / 354
页数:10
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