浅海声场中时频互谱估计目标的绝对速度  

Estimation of the absolute velocity of a target based on the time-frequency cross-spectrum in the shallow sea acoustic field

作　　者：赵安邦 宋鹏飞[2] 惠娟 郎俊杰 ZHAO Anbang;SONG Pengfei;HUI Juan;LANG Junjie(Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China;College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China;College of Engineering, Tibet University, Lhasa 850000, China;The 54th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang 050081, China)

机构地区：[1]哈尔滨工程大学水声技术重点实验室,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001 [3]西藏大学工学院,西藏拉萨850000 [4]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《哈尔滨工程大学学报》2021年第10期1490-1495,共6页Journal of Harbin Engineering University

基　　金：水声对抗技术国防科技重点实验室开放基金项目(SSDKKFJJ20180202);54所新技术研究高校合作项目课题;声呐技术重点实验室基金项目(614210902011906);国防基础加强计划技术领域基金项目(2020JCJQJJ126);目标特性重点实验室基金(61424070102).

摘　　要：目标绝对速度是表征目标运动特征的一个重要物理量,绝对速度的估计在目标被动测距、识别等方面有重要作用,现有文献都是围绕目标径向速度的估计。本文基于声场干涉理论,推导了原理最近通过距离时目标的互谱规律,提出了一种应用于单水听器目标绝对速度及距离被动估计的时频互谱算法。运用R-WVD变换对互谱信号进行处理,结合Hough变换来被动估计目标绝对速度及最近通过距离。计算机仿真得到绝对速度和最近通过距离估计误差约为2%,海试试验数据分析得到两者误差均在10%以内。本文验证了该方法的可行性并且具有很好的应用前景。The absolute velocity of a target is an important physical quantity that characterizes its motion characteristics.The estimation of the absolute velocity plays an important role in the passive ranging and identification of targets.Existing studies performed an all-around estimation of the radial velocity of a target.Based on the interference theory of the acoustic field,the cross-spectrum law of the target at the nearest passing distance is derived,and a time-frequency cross-spectrum algorithm is applied to the passive estimation of the absolute velocity and distance of a single hydrophone target is proposed.The R-Wigner-Ville distribution transform is used to process the cross-spectrum signals,and the Hough transform is used to passively estimate the absolute velocity and closest passing distance of the target.The estimated error of the absolute velocity and the nearest passing distance obtained by a computer simulation is approximately 2%,and the data analysis of the sea trial shows that both errors are within 10%.The feasibility of this method is verified,and the result shows that it has a good application prospect.

关 键 词：单水听器 被动声呐测速 互谱分析 时频分析 干涉条纹 条纹提取 被动声呐测距 

分 类 号：TB566[交通运输工程—水声工程]