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利用水下声音可有效传播特征,提出了利用单一线列阵测试水下运动目标速度的方法.利用不同时刻运动目标和线列阵之间的几何关系,建立了速度测试的数学模型.本文介绍了最大拟然算法和信号相位匹配原理算法,用于高精度求解运动目标的方位角(DOA).对速度测试误差影响的关键因素进行了分析,提出了测试系统组成:在运动目标相隔一定距离部位上安装两发射不同频率的换能器,在距运动目标不远处布上装有电子罗盘和深度传感器的线列阵,同时配备有信号采集记录仪.推导了系统特别是线列阵的参数要求.考虑工程上实际误差并进行仿真计算,仿真计算表明,一个孔径小于1m的16元阵均匀线列阵的速度测试误差小于4%.消声水池和水库试验进一步验证了模型和仿真计算的正确性.
In this paper, underwater acoustic signals can be used to effectively propagate the signals, and a new method to measure underwater target velocity using single line array is proposed. The mathematical model of velocity measurement is established by using the geometric relation between moving targets and line arrays at different time. The algorithm of maximum mimic algorithm and signal phase matching principle is used to solve the DOA of moving target with high precision.The key factors that affect the speed test error are analyzed and the test system is proposed.At the same time, Two transducers with different frequencies were installed on the site and a line array equipped with electronic compass and depth sensor was arranged not far away from the moving object and equipped with a signal acquisition and recording instrument.The parameters of the system, especially the line array, were deduced Requirements.According to the actual error in the engineering and the simulation calculation, the simulation results show that the speed error of a 16-element array with an aperture less than 1m is less than 4% .According to anechoic tank and reservoir test, the model and simulation calculation Correctness