计算飞航导弹RCS的混合方法

本文提出了一种计算复杂形状物体RCS的算法。这个方法在应用物理光学原理求解散射场时,把散射体表面分割成许多小曲面元,用平面板块柔代替曲面元,求出板块元的散射场矢量之和作为物体散射场的近似值。由于求板块元散射场的积分运算转化成了代数运算,使这种方法具有运算速度快,应用灵活的特点。经与实际测量结果对比,计算结果是较为满意的。

A HYBRID TECHNIQUE FOR COMPUTING RCS OF THE CRUISE MISSILE

in order to get the scattering field of the body with complex shape and big size such as the aeroplane and the missile, a hybrid mehtod is proposed in this paper. The "planar elements method" is used to calculate the scattering of the missile's surface. Edge-diffracted fields of the missile wings are estimated by equivalent edge current. The "modal field method" is adopted to evaluate scattering fields of the inlet and outlet. The three methods mentioned above have the advantages of simplicity and rapidness. The main contributions of this paper are:(l)The authors are the first to present in open literature hybrid method for computing RCS of the missile. (2)thc authors apply the planar element method used in aerodynamic calculation to compute the electromagnetic scattering field. (3)The authors develop a new modal field method basing on Pathak and Chuang's theory. The computation of the inlet's scattering field can be finished in personal computer. The results got by the hybrid technique for missile show that, as compared with the experimental results, the mean error of the method is less than 5 dB.