Radiated noise measurement method of underwater low noise target by a vertical nested array

作     者：LI Xuegang JIANG Guoqing SUN Guocang HUA Runan ZHU Jie LI Xuegang;JIANG Guoqing;SUN Guocang;HUA Runan;ZHU Jie

作者机构：Wuhan Second Ship Design and Research InstituteWuhan 430205 School of Marine Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710072 

出 版 物：《Chinese Journal of Acoustics》 (声学学报（英文版）)

年 卷 期：2024年第43卷第1期

页      面：98-112页

核心收录：

学科分类：07[理学] 082403[工学-水声工程] 08[工学] 070206[理学-声学] 0824[工学-船舶与海洋工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (51409199) 

主　　题：underwater method bands 

摘      要：A radiated noise measurement method of underwater acoustic targets with relatively low power by a vertical nested array is studied. Firstly, the array gain requirements for different frequency bands are obtained through comparative analysis of the background noise level and the radiated noise level of the target. Secondly, an ultra wideband constant-beamwidth beamforming method with high robustness is established for the waveguide environment based on convex optimization. The radiated noise measurement and the following spatial array signal processing procedure is formulated. Finally, a vertical nested array measurement system is developed, and the radiated noise measurement method is verified using lake test data. Experimental results show that the radiated noise measurement method has large working bandwidth, high robustness and low measurement uncertainty of about 2 dB.