基于垂直线列阵的深海被动目标定深精度分析

Analysis of Accuracy for Passive Estimation of Target Depth in Deep Sea Based on Vertical Linear Array

首先研究了在深海环境下,采用三阵元垂直线列阵水声探测系统进行被动目标定深的基本原理,推导出了估计目标深度的理论公式。然后分别从随机误差、阵元配置偏差和相干多途水声信道的干扰的角度,对影响被动目标定深精度的各个误差源进行了理论分析,推导出了相关的理论公式,并提出了时延系数的概念。通过仿真实验,总结出各个误差源对被动目标定深精度的影响的规律,为进一步开展被动目标定深研究、提高被动目标定深精度奠定了基础。

Firstly, the elementary principle of target passive estimation of depth is studied, which is supported by underwater acoustic detection system of vertical linear array and is conducted in deep sea, and theoretical estimation formula of target depth is deduced afterwards. Then, error sources of target passive estimation of depth are analysed theoretically from points of view of random error, deployment deviation of vertical linear array and disturbance of underwater acoustic channels of correlative multiple tracks, and correlative theoretical formulae are deduced. Besides, the conception of coefficient of time delay is presented. After simulation experiments, the law of how these error sources impact the accuracy of target passive estimation of depth is got, which is the basis for further researching target passive estimation of depth and improving the accuracy of target passive estimation of depth.