| 一种射线追踪法的效率改进算法研究 |
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| 引用本文： | 黄沛霖,武哲.一种射线追踪法的效率改进算法研究[J].北京航空航天大学学报,2003,29(7):607-610. |
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| 作者姓名： | 黄沛霖 武哲 |
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| 作者单位： | 北京航空航天大学 飞行器设计与应用力学系, 北京 100083 |
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| 摘 要： | 为改善计算效率,提出了一种局部口面网格优化算法对射线追踪法进行改进. 通过将射线管总口面划分为局部口面网格,在每局部口面上抽取采样射线管用于判断其贡献级别,并由计算级别决定是否对局部口面内的射线管进行实际计算,从而避免大量的无贡献射线管参与求交计算,节省射线求交运算时间. 经编程计算验证,该优化算法能够在保证相当的精度的前提下,大幅度提高射线追踪法的计算效率. 具有一定的实用价值.
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| 关 键 词： | 耦合 射线迹径 口面 |
| 文章编号： | 1001-5965(2003)07-0607-04 |
| 收稿时间： | 2002-05-10 |
| 修稿时间： | 2002年5月10日 |
Research on high-efficiency arithmetic to improve ray trace method |
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| Huang Peilin,Wu Zhe.Research on high-efficiency arithmetic to improve ray trace method[J].Journal of Beijing University of Aeronautics and Astronautics,2003,29(7):607-610. |
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| Authors: | Huang Peilin Wu Zhe |
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| Institution: | Dept. of Flight Vehicle Design and Applied Mechanics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China |
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| Abstract: | A new technique named local aperture grid optimization arithmetic was presented to improve the efficiency of the classical method. The chief aperture that contains all the rays in the incident field was divided into local aperture grids, on which selected sampling rays was calculated to determine its contribution level.Pre defined calculation level was used to determine whether to calculate the rest rays on the local aperture or not. Therefore the rays that have no or little RCS contribution were neglected and the calculating time consumed on intersecting judgment was reduced. By programming examination, the optimization arithmetic was proved to be fairly precise and remarkably efficient, and also applied. |
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| Keywords: | coupling ray trace aperture |
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