基于改进Gordon方程的RCS快速算法  

Fast Algorithm for Calculating RCS Based on Improved Gordon Equation

作　　者：徐灿 李智 

机构地区：[1]装备学院航天装备系,北京101416 [2]装备学院航天指挥系,北京101416

出　　处：《装备学院学报》2016年第5期85-89,共5页Journal of Equipment Academy

基　　金：国家级资助项目(2015AA7046104)

摘　　要：Gordon方程是物理光学法计算平面面元雷达散射截面积(RCS)的一种围线积分实现形式,其运算量与复杂目标拆分面元边的数量成正比。首先,通过对Gordon方程计算相邻平面面元RCS表达式的分析,证明了同一平面内两面元的公共边对RCS计算没有贡献的推论。其次,提出在预处理阶段利用排除法筛选并剔除公共边,简化RCS计算过程并避免引入新的计算量。由于消除了目标三维模型面元化处理过程中所形成的公共边,计算速度提高33%以上。最后通过2个实验算例验证了所提方法的正确性。Gordon equation is a contour integral implementation to calculate the plane surface radar cross section（RCS）with physical optics method,and its computational cost is proportional to the number of edges of complex target split surface.First of all,through analysis on the RCS expression for the calculation of adjacent surface elements with Gordon equation,the paper proves the inference that the common side of two surface elements on the same plane has no contribution to the RCS calculation.Secondly,the paper puts forward screening and eliminating common sides with exclusion method in the preprocessing stage and simplifying the calculation process while avoiding introducing additional computation.Due to eliminating the common sides formed in the 3Dtarget model surface element treatment process,computation speed is increased by over 33%.Finally,with two experiments the paper verifies the validity of the proposed method.

关 键 词：GORDON方程 围线积分 公共边 

分 类 号：TN95[电子电信—信号与信息处理]