飞机表面绕射射线的寻迹方法

研究一种电子对抗特种飞机表面绕射射线的寻迹新方法.对飞机进行快速三维几何建模和表面网格剖分,并根据需要对几何模型的剖面和结点加密,生成飞机表面网格数据;选定寻迹区域,对飞机表面网格结点进行管理,根据费马原理,采用改进的动态规划方法,在飞机表面网格上快速、准确地实现任意源点和绕射接收点间的短程线计算;在此基础上,采用递归方法实现可视化的几何绕射理论(GTD)、一致性几何绕射理论(UTD)绕射射线离散寻迹.绕射射线离散寻迹为数值方法求解机身表面任意两点间的天线隔离度提供了条件. 

Discrete ray path tracing on aircraft

A novel diffraction ray tracing method on convex surfaces of electronic warfare special aircraft was investigated.Quickly-3D-model of aircraft was carried out,and surface grids were meshed on the model to provide surface discrete grids data.Enough points can be achieved by minutely modeling or interpolating splines and nodes.Base on tracing area was selected and grid nodes were managed,according to Fermat principle,the length of geodesic path between the source and incept point can be calculated quickly and veraciously with the method of improved dynamic programming on the platform surface discrete grids served as.Then,discrete geometrical theory of diffraction(GTD) and uniform geometrical theory of diffraction(UTD) ray tracing on aircraft was realized with the method of recursive method.This work provided an approach for quickly analyzing antenna isolation with numerical method.