适用于裁剪NURBS曲面RCS预估的改进的物理光学法

doi:10.3969/j.issn.1001-2400.2010.05.021

J4 ›› 2010, Vol. 37 ›› Issue (5): 893-897.doi: 10.3969/j.issn.1001-2400.2010.05.021

适用于裁剪NURBS曲面RCS预估的改进的物理光学法

关莹;龚书喜;徐云学;张帅;姜文

(西安电子科技大学天线与微波技术重点实验室，陕西西安 710071)

收稿日期:2009-10-20 出版日期:2010-10-20 发布日期:2010-10-11
通讯作者: 关莹
作者简介:关莹(1984-)，女，西安电子科技大学博士研究生，E-mail: guanyingwanwan@163.com．
基金资助:
国家自然科学基金资助(60801042)

Improved PO technique for the RCS computation of targets modeled with trimmed NURBS surfaces

GUAN Ying;GONG Shu-xi;XU Yun-xue;ZHANG Shuai;JIANG Wen

(Key Lab. of Antennas and Microwave Technology, Xidian Univ., Xi'an 710071， China)

Received:2009-10-20 Online:2010-10-20 Published:2010-10-11
Contact: GUAN Ying

摘要/Abstract

摘要：

分析了驻相法(SPM)计算裁剪非均匀有理B样条(NURBS)曲面上物理光学积分失效的原因; 在此基础上综合驻相法和Gordon算法的优点，提出了SPM-Gordon算法来准确快速计算裁剪NURBS曲面上的物理光学积分．与完全采用高斯积分计算裁剪曲面上物理光学积分的传统方法相比，新算法避免了繁琐耗时的数值积分，计算速度快，所需内存少．数值结果表明，当裁剪曲面被裁去区域与有效域面积之比小于0.5时，在同等精度下，对于采用裁剪曲面建模的大多数目标，SPM-Gordon算法计算RCS所需的时间仅仅为传统方法的10%以下．

关键词: 裁剪NURBS曲面, 电磁散射, 物理光学积分, SPM-Gordon算法, 雷达截面

Abstract:

The invalidity of the stationary phase method (SPM) in the evaluation of the PO integral over trimmed surfaces is analyzed theoretically, on the basis of which the SPM-Gordon algorithm is presented to evaluate the PO integral over trimmed surfaces accurately and effectively. Compared with the conventional method in which numerical integrations are utilized, this new algorithm successfully avoids the complex and time-consuming numerical integrations and releases the heavy burden on the CPU. Numerical results indicate that when the area of the trim region is less than half of that of the effective region, the time consumed by the SPM-Gordon method is no more than 10 percent that by the conventional method in most cases.

Key words: trimmed NURBS surfaces, electromagnetic scattering, PO integral, SPM-Gordon algorithm, RCS

关莹;龚书喜;徐云学;张帅;姜文. 适用于裁剪NURBS曲面RCS预估的改进的物理光学法[J]. J4, 2010, 37(5): 893-897.

GUAN Ying;GONG Shu-xi;XU Yun-xue;ZHANG Shuai;JIANG Wen. Improved PO technique for the RCS computation of targets modeled with trimmed NURBS surfaces[J]. J4, 2010, 37(5): 893-897.

参考文献

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适用于裁剪NURBS曲面RCS预估的改进的物理光学法

Improved PO technique for the RCS computation of targets modeled with trimmed NURBS surfaces

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