高超声速飞行器雷达散射截面分析

为完善高超声速飞行器（HCV）雷达散射截面（RCS）的工程计算方法，综合应用几何光学法（GO）、物理光学法（PO）、等效电磁流法（MEC）等高频近似方法计算飞行器各散射中心的RCS贡献。结合理想二面角反射器RCS的经验公式，提出等效照明面积概念，并用于计算翼身组合段的RCS。采用后向面判别法和深度缓冲器算法分析面元之间的遮挡关系，计算了整个高超声速飞行器的RCS。计算结果与矩量法结果吻合，可满足工程分析和飞行器多目标优化设计的需要。

RCS Analysis of Hypersonic Cruise Vehicle

In order to improve the engineering method of Radar Cross Section(RCS) of Hypersonic Cruise Vehicle(HCV),high frequency scattering theories,including geometrical optics(GO),physical optics(PO) and method of equivalent currents(MEC),are used.By these methods,RCS of various scattering centers of HCV is computed.Combined with the engineering RCS formula of ideal dihedral corner reflector,the concept of equivalent illustration area(EIA) is presented,which is applied to compute the RCS of wing and fuselage joints.To compute RCS of whole HCV,the shadowing relationship of facet analyzed by the method of backward surface identification and depth-buffer is considered.The computed result is good fit for the result of MOM and can satisfy the need of engineering analysis and multi-objective optimization of aircrafts.