基于三角面元模型的复杂目标棱边提取
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摘要
等效边缘电磁流法是计算超电大目标电磁散射特性的有力工具之一。当目标为复杂目标时,目标棱边提取是分析中的重要一环。文中根据目标模型特征提出了一种棱边提取的方法。使用商业软件Hypermesh建模并输出模型三角面元数据,采用穷举法给出所有三角面元及与其相邻的三角面元信息,通过设定角度阀值确定属于目标棱边的三角面元,接着判断该面元所含棱边的凹凸性,完成棱边提取。数值结果表明,该方法可以精准提取复杂目标棱边的数据信息。
As one of the powerful tools to calculate the electromagnetic scattering effects of electrically large objects, the equivalent edge current method is widely used. The edge extraction plays an important role in the analysis of complex target. Based on the characteristics of the target model, a method for edge data extraction was proposed in this paper. The target was modeled and its triangular patches data was outputted by Hypermesh, then the exhaustive method was used to find all triangular patches and their adjacent patches data. The triangle data belonging to the target edge was obtained by setting the angle threshold. The convexity and concavity of the edges contained in target were determined by solving sum vector. The numerical results showed that the proposed method could extract edge data accurately and reliably.
As one of the powerful tools to calculate the electromagnetic scattering effects of electrically large objects, the equivalent edge current method is widely used. The edge extraction plays an important role in the analysis of complex target. Based on the characteristics of the target model, a method for edge data extraction was proposed in this paper. The target was modeled and its triangular patches data was outputted by Hypermesh, then the exhaustive method was used to find all triangular patches and their adjacent patches data. The triangle data belonging to the target edge was obtained by setting the angle threshold. The convexity and concavity of the edges contained in target were determined by solving sum vector. The numerical results showed that the proposed method could extract edge data accurately and reliably.
引文
[1] 葛德彪,魏兵.电磁波理论[M].北京:科学出版社, 2011. Ge Debiao,Wei Bing.Electromagnetic wave theory [M]. Beijing:Science Press,2011.
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[3] 葛德彪,魏兵.电磁波时域计算方法(下)[M].西安:西安电子科技大学出版社,2014. Ge Debiao,Wei Bing.Time domain calculation method of electromagnetic wave(Part 2)[M].Xi’an: Xidian University Press,2014.
[4] 杨凌霞.时域等效边缘电磁流方法及其在电磁散射中的应用[D].西安:西安电子科技大学,2003. Yang Lingxia.Time domain equivalent edge current method and its application to electromagnetic scattering [D].Xi’an:Xidian University Press,2003.
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[7] Michaeli A.Equivalent edge currents for arbitrary aspects of observation[J].IEEE Transactions on Antennas Propagat,1984,32(3):252-258.
[8] Michaeli A.Elimination of infinities in equivalent edge currents, part 2 physical optics components[J].IEEE Transactions on Antennas Propagat,1986,34(8):1034-1037.
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[10] Ando A,Murasski T,Kinoshita T.Elimination of false singularities in GTD equivalent edge currents[J].IEE Proceedings-H, 1991, 138(4): 289-296.
[11] 崔索民.混合法和等效边缘电磁流法及其电磁散射中的应用[D].西安:西安电子科技大学,1995. Cui Suomin. Hybrid method and equivalent edge electromagnetic flow and its application in electromagnetic scattering[D].Xi’an:Xidian University, 1995.
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[13] 金桂玉.目标近场电磁散射特性计算与应用[D].南京: 南京理工大学,2012. Jin Guiyu.Calculation and application of near-field scattering characteristics of targets[D].Nanjing:Nanjing University of Science and Technology,2012.
[14] 王钰栋,金磊.HyperMesh & HyperView应用技巧与高级实例[M].北京:机械工业出版社,2012. Wang Yudong,Jin Lei.HyperMesh & HyperView application tips and advanced examples[M].Beijing: China Machine Press,2012.
[15] 欧紫娟.基于CATIA建模的雷达引信目标RCS计算及应用[D].南京:南京理工大学,2013. Ou Zijuan.Radar fuze target RCS calculation and application based on CATIA[D].Nanjing:Nanjing University of Science and Technology,2013.
[16] 刘建宁,刘继芳,石顺祥,等.全反射棱镜式激光陀螺腔长控制过程研究[J].电子科技,2010,23(7):32-35. Liu Jianning,Liu Jifang, Shi Shunxiang,et al.Analysis of cavity length control of laser gyro with total reflection prisms[J].Electronic Science and Technology,2010, 23(7),32-35.
[17] 杨勇明.基于有限元的涡轮蜗杆传动性能模态分析[J]. 电子科技,2016,29(8):82-88. Yang Yongming.Model analysis of worm gear transmission performance by the finite element method [J].Electronic Science and Technology,2016,29(8):82-88.
[2] 葛德彪,魏兵.电磁波时域计算方法(上)[M].西安:西安电子科技大学出版社,2014. Ge Debiao,Wei Bing.Time domain calculation method of electromagnetic wave (Part 1)[M].Xi’an:Xidian University Press,2014.
[3] 葛德彪,魏兵.电磁波时域计算方法(下)[M].西安:西安电子科技大学出版社,2014. Ge Debiao,Wei Bing.Time domain calculation method of electromagnetic wave(Part 2)[M].Xi’an: Xidian University Press,2014.
[4] 杨凌霞.时域等效边缘电磁流方法及其在电磁散射中的应用[D].西安:西安电子科技大学,2003. Yang Lingxia.Time domain equivalent edge current method and its application to electromagnetic scattering [D].Xi’an:Xidian University Press,2003.
[5] 汪茂光.几何绕射理论[M].西安:西安电子科技大学出版社,1994. Wang Maoguang.Geometric diffraction theory [M]. Xi’an: Xidian University Press,1994.
[6] Michaeli A.Elimination of infinities in equivalent edge currents, part 1:fringe current components [J].IEEE Transactions on Antennas Propagat,1986,34(5):912-918.
[7] Michaeli A.Equivalent edge currents for arbitrary aspects of observation[J].IEEE Transactions on Antennas Propagat,1984,32(3):252-258.
[8] Michaeli A.Elimination of infinities in equivalent edge currents, part 2 physical optics components[J].IEEE Transactions on Antennas Propagat,1986,34(8):1034-1037.
[9] 朱蕾.目标电磁散射的时频域方法研究[D].西安:西安电子科技大学,2009. Zhu Lei.Study on the time-domain and frequency-domain methods for electromagnetic scattering[D].Xi’an:Xidian University,2009.
[10] Ando A,Murasski T,Kinoshita T.Elimination of false singularities in GTD equivalent edge currents[J].IEE Proceedings-H, 1991, 138(4): 289-296.
[11] 崔索民.混合法和等效边缘电磁流法及其电磁散射中的应用[D].西安:西安电子科技大学,1995. Cui Suomin. Hybrid method and equivalent edge electromagnetic flow and its application in electromagnetic scattering[D].Xi’an:Xidian University, 1995.
[12] 崔索民,吴振森.PTD和PTDEEC算式的奇异点处理[J]. 电波科学学报,1997,12(4):369-374. Cui Suomin,Wu Zhensen.Treatment of singularities in PTD and PTDEEC[J].Chinese Journal of Radio Science,1997,12(4): 369-374.
[13] 金桂玉.目标近场电磁散射特性计算与应用[D].南京: 南京理工大学,2012. Jin Guiyu.Calculation and application of near-field scattering characteristics of targets[D].Nanjing:Nanjing University of Science and Technology,2012.
[14] 王钰栋,金磊.HyperMesh & HyperView应用技巧与高级实例[M].北京:机械工业出版社,2012. Wang Yudong,Jin Lei.HyperMesh & HyperView application tips and advanced examples[M].Beijing: China Machine Press,2012.
[15] 欧紫娟.基于CATIA建模的雷达引信目标RCS计算及应用[D].南京:南京理工大学,2013. Ou Zijuan.Radar fuze target RCS calculation and application based on CATIA[D].Nanjing:Nanjing University of Science and Technology,2013.
[16] 刘建宁,刘继芳,石顺祥,等.全反射棱镜式激光陀螺腔长控制过程研究[J].电子科技,2010,23(7):32-35. Liu Jianning,Liu Jifang, Shi Shunxiang,et al.Analysis of cavity length control of laser gyro with total reflection prisms[J].Electronic Science and Technology,2010, 23(7),32-35.
[17] 杨勇明.基于有限元的涡轮蜗杆传动性能模态分析[J]. 电子科技,2016,29(8):82-88. Yang Yongming.Model analysis of worm gear transmission performance by the finite element method [J].Electronic Science and Technology,2016,29(8):82-88.