Electromagnetic occultation algorithm based on facets grouping and optimization
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摘要: 用物理光学法计算复杂目标的雷达散射截面(RCS,Radar Cross Section)时,通过面元沿电磁波入射方向的重叠关系和景深来判断面元之间的遮挡.将面元投影在与电磁波入射方向垂直的平面上进行分组,使同组的面元距离相近.在计算中只需对同组的面元判断遮挡关系,避免了所有面元的两两遮挡判断,从而节省计算时间,并对分组进行了优化,使计算时间最少.算例表明,基于面元分组的遮挡判断方法可行,能够大大提高计算效率.Abstract: When calculating complex target-s radar cross section(RCS) with physical optics(PO) method, the facets shadowing relationship was judged through overlapping and depth-of-view of facets along the incident wave direction. The facets were projected on the plane that was perpendicular with the incident wave direction and then grouped to several groups to make sure that the distance of facets in the same group were close. Only the facets in the same group needed to be judged whether they are shadowed or not instead of making the judgement between all of the facets thus the calculating time was saved. The grouping size was optimized to make the the calculating time be the least. The calculating examples showed that this method is feasible and can make the calculating more efficient.
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Key words:
- physical optics(PO) /
- occultation /
- facets /
- grouping /
- radar cross section(RCS)
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[1] 阮颖铮.雷达散射截面[M].北京:电子工业出版社,1988 Ruan Yingzheng.Radar cross section[M].Beijing: Electronics Industry Press,1988(in Chinese) [2] Johnson J T,Warnick K F,Xu Peng.On the geometrical optics (Hagfors- law) and physical optics approximations for scattering from exponentially correlated surfaces[J].Geoscience and Remote Sensing,IEEE Transactions,2007,45(8): 2619-2629 [3] 黄沛霖.大型、复杂耦合散射目标的RCS计算方法研究 .北京:北京航空航天大学航空科学与工程学院,2003 Huang Peilin.Research on RCS computing technique of large-scale and complicated coupling scattering object .Beijing: School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics,2003(in Chinese) [4] 李争亭,胡毕富,席平.腔体RCS计算前置处理中网格单元的相互遮挡判断[J].工程图学学报,2008,29(1):61-66 Li Zhengting,Hu Bifu,Xi Ping.Mutual occlusion evaluation of duct mesh elements in processing of RCS calculation[J].Journal of Engineering Graphics,2008,29(1):61-66(in Chinese) [5] 陈海涛,卞恩荣.武装直升机红外辐射计算中多重遮挡处理[J].北京航空航天大学学报,2006,32(4):391-394 Chen Haitao,Bian Enrong.New algorithm of processing multi occultation and its application in infrared radiation calculation of military helicopter[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(4):391-394(in Chinese) [6] 周建江,舒永泽.简单形体目标电磁遮挡算法研究[J].南京航空航天大学学报,1995,27(1):97-101 Zhou Jianjiang,Shu Yongze.Research on electromagnetic shadowing algorithm of simple targets of simple targets[J].Journal of Nanjing University of Aeronautics and Astronautics,1995,27(1):97-101(in Chinese) -
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