平台机动条件下目标回波图像仿真

Imaging Simulation of Targets Echoes Based on Condition of Maneuverable Flat

水下目标回波图像涉及到声散射问题,为提高目标回波求解效率,传统解析方法对水下非刚性目标回波求解过程复杂,难以在工程上广泛应用。根据主动声纳线性目标模型,引用界面附近目标回波的物理声学(Kirchhoff近似)方法,建立了平台机动条件下目标回波图像的仿真方案。在混响背景下对回波信号时域波形的后置处理,利用Matlab编程软件生成了比较真实的方位—距离联合表示的二维回波图像,读取图像要素可以达到对目标定位及识别的目的。仿真结果表明,目标回波的求解过程方便易行,仿真图像逼真地反映了平台机动时目标回波图像的对应变化,实现了对目标的有效定位。方法对模拟训练领域具有重要的应用价值,可以用于高频图像声纳模拟软件平台的研制。

It is inevitabe to compute sound scatter in the course of imaging simulation of underwater targets ech- oes. Traditional analytics is too complex to be applied in engineering. According to the linear object model of active sonar quoted physical acoustic method （ Kirchhoff approximation） of targets echoes near an interface, this paper pres- ented an imaging simulation method of targets echoes based on the condition of maneuverable flat. Simulated echoes signals were processed under the background existing reverberation and then the planar echoes imaging was displayed by the way of bearing - range by employing the Matlab software. The simulate results indicate that it is convenient to compute sound scatte and the simulated imaging can realistically reflect the varity when the sonar flat is maneuvered.