水声探空动目标参数测量方法  

Hydroacoustic measurement method of airborne moving target parameters

作　　者：石海杰 李京华[1] 陈刚[3] SHI Haijie;LI Jinghua;CHEN Gang(School of Electronics and Information, Northwestern Polytechnical University, Xi’an 710129, China;School of Information and Communication Engineering, North University of China, Taiyuan 030051, China;Dongying Branch,China United Network Communication Company Limited, Dongying 257000, China)

机构地区：[1]西北工业大学电子信息学院,陕西西安710129 [2]中北大学信息与通信工程学院,山西太原030051 [3]中国联合网络通信有限公司东营市分公司,山东东营257000

出　　处：《系统工程与电子技术》2021年第1期11-18,共8页Systems Engineering and Electronics

基　　金：近地面探测技术重点实验室稳定支持项目(TCGZ2020C002)资助课题。

摘　　要：针对空动目标参数的水声探测,建立空中运动目标激发水声信号的瞬时频率模型和运动目标参数测量模型,首先采用分段互谱密度方法测量瞬时频率,然后采用局部线性化方法测量目标速度、通过时刻、水平距离等参数。最后,仿真分析与实验结果表明:测量精度受到噪声、采样时长、目标速度、水平距离等多种因素影响,当水平距离与速度的比值在10~15范围内时,测量精度较高;在仿真条件下,速度和距离的测量精度优于3.6%,通过时刻测量精度达到0.48 s;在实测条件下,两次实验数据得到的目标速度精度分别为7.5%和8.9%,距离精度分别为16.0%和20.3%。仿真和实测结果说明本方法的正确性和可行性较高。Focusing on the hydroacoustic measurement of airborne moving target parameters,the instantaneous frequency model for airborne moving target which excite underwater acoustic signals and moving target parameters measurement model are established.Firstly,the instantaneous frequency is measured using the piecewise cross-spectral density method.Secondly,local linearization method is used to measure parameters such as target speed,passing time and horizontal distance.Finally,simulation analysis and experiment results show that the accuracy is affected by various factors such as noise,sampling duration,target speed,and horizontal distance.When the ratio of horizontal distance to speed is within the range of 10~15,the measurement accuracy is high.Under the simulation conditions,the accuracy of speed and distance is better than 3.6%,and the measuremenr accuracy of passing time is better than 0.48 s.Under the experiment conditions,the speed accuracy of two experimental datas are 7.5%and 8.9%,and the distance accuracies are 16.0%and 20.3%,respectively.The simulation and experiment results show the validity and feasibility of the method feasible.

关 键 词：水声 多普勒效应 互谱密度 最近距离点 瞬时频率 

分 类 号：TN911.7[电子电信—通信与信息系统]