关键词: 均匀线阵, 奇异值分解, 机器噪声源, 方位角, 定位

Abstract:

The problem how to locate multiple coherent spherical wavefront noise sources with narrow band is solved in the paper.Based on the theory of array signal processing, a method is proposed to estimate bearings of multiple coherent mechanical noise sources with the singular value decomposition(SVD) of a data matrix and orthogonality of spectrum using a uniform linear array.Based on it, a method can be applied to locate the mechanical noise sources by changing the position of the array center using geometry relation of array.The theory of singular value decomposition(SVD) algorithms is verified by computer numerical tests and acoustics experiments in an anechoic room.The results of tests and experiments show that mean square error(MSE) of bearings and locations of multiple noise sources is little.Compared with typical method of multiple signal classification(MUSIC) based on the theory of array signal processing, the method has high resolution.It shows that the method is effective.

Key words: uniform linear arr ay, singular value decomposition, mechanical noise sources, bearings, locat ion