宇航学报 ›› 2014, Vol. 35 ›› Issue (5): 597-603.doi: 10.3873/j.issn.1000-1328.2014.05.014

• 电子信息 • 上一篇    下一篇

基于双线性基函数的TDIE方法求解空间目标电磁特性

赵庆广,赵延文,黄小虎,路同山,陈占胜   

  1. 1.上海卫星工程研究所,上海 200240; 2.电子科技大学,成都 610054;
    3.上海航天技术研究院,上海 201109
  • 收稿日期:2013-06-06 修回日期:2013-12-11 出版日期:2014-05-15 发布日期:2014-05-25

Solving Space Target Electromagnetic Characters by Linear Linear Basis Functions Based TDIE Method

ZHAO Qing guang,  ZHAO Yan wen,  HUANG Xiao hu,  LU Tong shan,  Chen Zhan sheng   

  1. 1. Shanghai Institutes of Satellite Engineering,Shanghai 200240,China;
     
    2. University of Electronic Science and Technology of China,Chengdu 610054,China;
    3.Shanghai Academy of Spaceflight Technology,Shanghai 201109,China
  • Received:2013-06-06 Revised:2013-12-11 Online:2014-05-15 Published:2014-05-25

摘要:

双线性(LL)基函数是在三角形单元公共边上法向和切向均线性变化的基函数,本文选取LL基函数作为基函数,推导了求解时域电场、磁场以及混合场积分方程的时间步进算法,给出了时域阻抗矩阵元素的计算表达式,在不同网格和相同未知量情况下对比了基于LL基函数的求解与基于RWG函数的求解精度。研究了求解含有大量棱边、棱角、板、体结构的导弹、卫星空间目标电磁特性的精度。数值结果表明,在没有增加计算量的情况下,LL基函数提高了时域磁场和混合场积分方程求解精度,适合于求解含有大量棱边、棱角、板、体结构的空间目标电磁特性。

关键词: 双线性基函数, 时域积分方程, 空间目标, 目标特性

Abstract:

Linear Linear basis functions(LL) are basis functions of linear change on the common edge of triangles in the perpendicular and tangential directions. Taking the LL basis functions as basis functions, a time stepping algorithm for solving the time domain electric field integral equation(TDEFIE), the time domain magnetic field integral equation(TDMFIE) and the time domain combined field integral equation(TDCFIE) are derived, the expression for calculation time domain impedance matrix elements is given ,a comparison between RWG basis function based solution accuracy and LL basis function based solution accuracy is made under the condition of different mesh and the same unknown quantity, the accuracies for solving the electromagnetic characteristics of satellites and missile space targets with arris edges, corners, plate and body structure are studied. The numerical simulation results show that the solution accuracy of the time domain magnetic field integral equation and the time domain combined field integral equation are improved without increasing the computational requirements,TDIE based LL basis function is suitable for solving the electromagnetic characteristics of space targets with arris edges,corners,plate and body structure.

Key words: Linear Linear basis function, Time domain integral equation (TDIE), Space target, Target Characteristics

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