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 .
A 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.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2003年第7期607-610,共4页
Journal of Beijing University of Aeronautics and Astronautics
关键词
耦合
射线迹径
口面
Algorithms
Calculations
Efficiency
Optimization
