旋转双阵元水下目标定向方法

Orientation method of underwater target based on a rotating dual-element array

提出一种旋转双阵元的水下目标定向方法,通过旋转双阵元,主动产生目标到达信号的多普勒效应,结合目标声波信号到达时间差,联合利用时间差和多普勒信息对目标进行定向.通过目标函数的设定,使得两路信号经过延时和伸缩后达到最佳匹配所对应的方向即为目标方向.仿真结果表明,在设定的场景下,本文提出的方法对于各个方向的目标均有良好的定向效果,对于1000m的目标平均定向角度误差小于1°;相对于双阵元到达时间差方法,具有更好的精度和鲁棒性。实验结果验证了旋转双阵元定向方法在实际应用中的有效性.

An orientation method of underwater target is proposed through rotating a dual-hydrophone array.By rotating the array,the Doppler effect of target signal is actively generated.The target orientation can be achieved by combining the Doppler information and the Time Difference Of Arrival(TDOA)of the target radiation sound.By setting proper objective function,orientation of target is decided by optimally matching the two signals after time delay and Doppler compensation.The simulation results in the scenario show that the proposed method has good orientation accuracy for targets in all directions.The average orientation error is less than 1°for 100 random targets distributed at distance of 1000 m.In comparison with conventional orientation methods on TDOA,the proposed method shows much higher accuracy and robustness.The experimental results verify the feasibility of the proposed method in practical application.