水下低噪声目标辐射噪声垂直嵌套阵测量方法  

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

作　　者：黎雪刚[1] 蒋国庆 孙国仓[1] 华如南 朱杰 LI Xuegang;JIANG Guoqing;SUN Guocang;HUA Runan;ZHU Jie(Wuhan Second Ship Design and Research Institute,Wuhan 430205;School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072)

机构地区：[1]武汉第二船舶设计研究所,武汉430205 [2]西北工业大学航海学院,西安710072

出　　处：《声学学报》2023年第5期971-977,共7页Acta Acustica

基　　金：国家自然科学基金项目(51409199)资助。

摘　　要：研究了一种水下低噪声目标辐射噪声垂直嵌套阵测量方法。首先通过分析试验水域背景噪声和被测目标辐射噪声特性,掌握不同测量频段的增益需求;然后采用凸优化方法,建立波导环境中超宽带、高稳健恒定束宽波束形成技术,推导水下目标辐射噪声垂直嵌套阵测量及空间阵列信息处理方法;最后研制垂直嵌套阵测量系统,并开展湖上试验验证。研究结果表明该测量方法具有测量带宽大、稳健性高、测量不确定度低等优点,辐射噪声测量不确定度约2 dB。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.

关 键 词：辐射噪声测量 垂直嵌套阵 恒定束宽波束形成 超宽带 

分 类 号：U661.44[交通运输工程—船舶及航道工程] U674.70[交通运输工程—船舶与海洋工程] TB566[交通运输工程—水声工程]