水下体目标回波空间方位特性仿真研究

分析并给出了水下尺度目标回波的亮点结构模型和稳态反射亮点与随机散射亮点数字时间序列生成方法。提出了一种利用布放在消声水池中的弧形阵同步发射经时变投影矩阵加权变换的多亮点声波时间序列来仿真水下体目标回波特性的方法。将该方法应用于实现自导仿真试验系统,仿真试验结果表明该方法能够较好地模拟目标空间尺度,除了能够模拟普通靶标的多亮点延迟重发,还具备模拟包括平滑连续、阶跳及其组合等在内的复杂目标空间方位变化的能力,并能够用于水下航行体制导系统的半实物仿真。

Research on Spatial Bearing Characteristics Simulation Method of Underwater Target Echo Based on Circular Arc Array

The highlight structure model of underwater target echo and the generating methods of reflecting and scattering highlights digital time series were introduced.A new simulation method for the spatial bearing characteristics of an underwater target echo based on a circular arc array placed in an anechoic tank was proposed.Each projector of the arc array transmits acoustic highlight simulating signals in synchronous or asynchronous mode.The transmitted signals were transformed into element space by the time-varied matrixes which were used to project the highlights on the circular arc array.These methods were applied in the homing system simulation.The simulation results show that the methods can get better simulation effect of an underwater target dimension.The methods not only can simulate the working mode of conventional acoustic simulator,but also can simulate more complex target bearing changing,and can be applied to underwater vehicle homing hardware in the loop simulation.