摘要
针对阵列成像声源定位系统对于低频噪声源定位空间分辨率低的问题,提出一种适用于低频噪声源的高分辨率定位方法。该方法在不改变传声器阵列孔径条件下,通过对传声器阵列在不同位置采集的噪声信号进行处理,合成虚拟的大孔径阵列,等效增大阵列的物理孔径,以虚拟阵列的信号输出值作为初始值,再使用多重信号分类(MUSIC)高分辨率算法对噪声源进行定位分析。将仿真实验结果与波束形成(SRP)算法进行对比分析,证明基于虚拟阵列的MUSIC噪声源定位方法在对中低频段噪声定位时具有较高的定位分辨率,同时对近距离的多个噪声源具有较好的分辨能力。
A high-resolution localization method for low-frequency noise sources is proposed.This method does not need to change the aperture of the microphone array.By processing the noise signals collected at different positions of the microphone array,a virtual large-aperture array is synthesized,which equivalently increases the physical aperture of the array.With the signal output value of the virtual array as the initial value and using the multiple signal classification(MUSIC)high resolution algorithm,the noise source is localized and analyzed.The comparative analysis of the simulation experiments and the beam forming(SRP)algorithm proves that the MUSIC noise source localization method based on virtual arrays has high positioning resolution in the middle and low frequency bands noise localization,and simultaneously it has better resolution for multiple noise sources localization in short distance range.
作者
刘国强
滕鹏晓
李春书
吕君
程巍
戴翊靖
LIU Guoqiang;TENG Pengxiao;LI Chunshu;LYU Jun;CHENG Wei;DAI Yijing(School of Mechanical Engineering,Hebei University of Technology,Tianjin 300130,China;Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190,China)
出处
《噪声与振动控制》
CSCD
2020年第6期115-120,共6页
Noise and Vibration Control
关键词
声学
声源定位
虚拟阵列
低频噪声
高分辨率定位
acoustics
sound source localization
virtual array
low frequency noise
high resolution localization
