多基地探测拖线阵声呐数据模拟器设计

Design of Towed Linear Sonar Simulator for Multi-static Detection

为了满足多基地协同探测实验的需求,设计了一种声呐阵元信号模拟器,模拟节点上拖线阵接收到的目标回波和直达波。针对多基地声呐系统中存在多平台复杂运动的情况,分析并解算各平台运动轨迹,建立各平台远场时延模型,实现目标方位和距离仿真。结合声呐方程,通过计算目标回波、直达波、背景噪声强度,实现信噪比仿真。通过仿真结果验证,该模拟器能够较好实现多基地探测中的信号模拟,准确表现目标回波和直达波信号特征,在理论研究和日常训练领域具有重要应用价值。

Aiming at the demand of multi-static sonar cooperative detection experiments,it designs a sonar array simulator to simulate target echo and direct wave which received by towed line array on the receiving node.For the complex motion of multi-platform in multi-static sonar system,by analyzing and calculating platform trajectory,the multi-platform far-field time delay model is established to realize the simulation of target azimuth and range.Combined with the sonar equation,the simulation of signal noise ratio is realized by calculating the intensity of target echo,direct wave and background noise.According to the result of signal processing,simulator can realize signal imitation in the detection of multi-static and shows the characteristics of target echo,direct wave exactly.As a result,the simulator has important application value in the theory research and the routine training field.