传声器阵列定位精度影响因素分析研究  

Study on Influencing Factor for Sound Localization Precision of Microphone Array

作　　者：贺谦[1] 冯建民[1] 孙志强[2] 韩凯[1] 

机构地区：[1]中国飞机强度研究所,全尺寸飞机结构静力/疲劳航空科技重点实验室,陕西西安710065 [2]国防科学技术大学,湖南长沙410073

出　　处：《工程与试验》2016年第3期30-32,共3页Engineering and Test

基　　金：航空基金(20150981006)资助项目

摘　　要：设计了矩形和圆形两种阵列形式,从阵列构型、基线、声源与阵列中心位置等几个方面进行传声器阵列定位精度影响因素分析,为传声器阵列设计定型以及基于声源的飞机结构损伤定位系统开发奠定基础。结果表明,在基线长度和阵元数量相等的情况下,矩形阵列的定位精度要优于圆形阵列;阵列基线长度越大,定位精度越高;当声源垂直于阵列面时,定位精度最高,声源越偏离阵列面,定位精度越低;在同样的阵列结构和时延估计误差下,声源与传声器阵列中心之间的距离越大,定位的绝对误差就越大;时延估计的误差越小,定位精度越高;对于飞机结构强度试验,应采用多传声器阵列的布设方式,提高声源定位精度。Sound localization precision of microphone array is analyzed from array configuration,base line,distance between sound and array with rectangular and circular array,which is the basement of microphone array and aircraft structural damage localization system. The result shows that precision of rectangular array is higher than circular one with the same base line length and microphone number. Localization precision is in direct proportion to base line length.Localization precision is higher when sound is perpendicular to the plane of array. Localization precision is inversely proportional to the distance between sound and array. Distributed microphone arrays should be employed in order to increase sound localization precision of aircraft structural strength test.

关 键 词：传声器阵列 声源定位 飞机结构 强度试验 

分 类 号：V216.54[航空宇航科学与技术—航空宇航推进理论与工程]