基于NURBS建模双曲率曲面RCS计算

为了提高计算的精度和效率,将NURBS参数曲面应用到电大尺寸目标的RCS预估中.使用CAD软件建立模型,通过对模型IGES文件中数据结构的分析,并以IGES文件为接口,从CAD软件模型中提取出NURBS曲面信息,然后用Cox-DeBoor算法把NURBS曲面转换为Bezier曲面,结合物理光学法和渐进积分展开法精确、高效的求解出任意理想导体目标曲面的RcS.

The Calculation on RCS of Double Curved Surface Based on NURBS

To multiply the accuracy and efficiency of computation,a technique is presented for the RCS prediction of electrically large conducting bodies,modeled by NURBS parametric surfaces.Aided with CAD software,the complex targets can be modeled.The data of NURBS surface which are based on the standard for IGES are extracted from the model,through analyzing the data structure of IGES files.Then the NURBS surfaces are expanded to Bezier patches via Cox-De Boor transform algorithm,and by using physical optics and as...