：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—De

Boor算法把NURBS曲面转换为Bezier益面，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-: In order to improve the calculation accuracy and efficiency of the NURBS parametric surfaces applied to the electrically large targets in the RCS estimate. The use of CAD software to model, through the IGES file, the model analysis of the data structure and to IGES file for the interface from the CAD software model to extract information on NURBS surfaces, and then Cox-De Boor algorithm to convert NURBS surfaces to Bezier surfaces benefit , combined with progressive physical optics method and integral expansion method accurate and efficient solution of a perfectly conducting random surface RCS targets