复杂目标高频区 RCS 的实时计算

COMPUTING HIGH FREQUENCY RCS OF COMPLEX TARGETS IN REAL TIME

提出一种在安装图形加速卡的高性能微机上实时计算复杂目标高频区雷达散射截面（ＲＣＳ）的方法。该方法利用了“图形电磁计算（ＧＲＥＣＯ）”的新技术。目标用Ｇ２Ｃａｔｍｕｌ－ｏｍ（Ｃ－Ｒ）几何样条模拟，由图形加速卡硬件完成遮挡、消隐运算，运用Ｐｈｏｎｇ光照模型着色渲染目标可见表面，应用物理光学（ＰＯ）、等效电流法（ＭＥＣ）、物理绕射理论（ＰＴＤ）及阻抗边界条件（ＩＢＣ）等方法计算目标高频区雷达散射截面（ＲＣＳ）。

A new approach is presented to compute the high frequency radar cross section(RCS)of complex radar targets in real time, using a Personal Computer with a 3 D graphics hardware accelerator. This method implements a new technique called “Graphical Electromagnetic Computing(GRECO)”.The target is modeled with G 2 Catmull Rom(C R) geometric spline and the image of the target is rendered and displayed on the screen in real time using Phone illumination model and the 3 D graphics accelerator, and then the high frequency RCS can be computed through Physical Optics(PO),Method of Equivalent Currents(MEC),Physical Theory of Diffraction(PTD),and Impedance Boundary Condition(IBC) techniques.