传声器阵列阵元坐标标定精度影响因素研究  

Study on Influencing Factor of Calibration Precision of Microphone Array Element Coordinates

作　　者：贺谦[1] 孙志强[2] 冯建民[1] 韩凯[1] He Qian;Sun Zhiqiang;Feng Jianmin;Han Kai(Aircraft Strength Research Institute,Aviation Technology Key Laboratory of Full Scale Aircraft Structure Static and Fatigue,Xi＇an 710065,Shaanxi,China;National University of Defense Technology,Changsha 410073,Hunan,China)

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》2018年第3期61-63,81,共4页Engineering and Test

基　　金：航空基金(20150981006)资助项目

摘　　要：从时延估计、求解算法以及声源数量等几个方面进行传声器阵列阵元坐标标定精度影响因素分析,为随机构型传声器阵列的阵元坐标准确标定以及飞机结构强度试验中异常声源定位奠定了基础。结果表明,标定误差与时延估计误差呈正比关系;在同样的时延估计误差下,采用单纯形替换法标定误差远小于最小二乘法;标定误差随着声源点数量的增加呈现递减趋势;声源位置对标定误差也有着比较明显的影响,应该尽可能地沿着X、Y、Z三个轴布置声源点。The influencing factors of calibration are analyzed in the aspects of the time delay precision of microphone array element coordinates of arrival （TDOA）, the solving algorithm and the quantities of sound sources, which lays a foundation for the accurate calibration of microphone army element coordinates and the localization of abnormal sound sources in aircraft structural strength test. The test results show that calibration error has direct relationship with TDOA error. In the condition of same TDOA error, simplex replacement algorithm has higher calibration precision than least square method. Calibration error decreases with the increase of sound sources. The localization of sound sources has obvious influence on the calibration error, so the sound sources should be arranged along X, Y, Z axis.

关 键 词：传声器阵列 标定 最小二乘法 单纯形替换法 

分 类 号：V216.5[航空宇航科学与技术—航空宇航推进理论与工程]