边缘绕射 meaning in English
edge diffraction
Examples
- Electromagnetic simulation computation uses three principal scattering mechanisms , including facet contribution , edge diffraction and multi - scattering
本文采用了镜面反射、边缘绕射以及多次反射这三种主要的散射源。 - Rcs of facets of targets coated ram was resolved by combining impedance boundary condition ( ibc ) and geometric optics ( go ) and rcs of those edges were approximated by computing the rcs of edges of impedance wedge through method of equivalent currents
其中，涂覆目标面元的散射场是通过结合阻抗边界条件和几何光学法( go )而得到；而涂覆目标棱边的散射场则是通过等效电磁流法求解阻抗劈的边缘绕射场近似得到的。 - Incremental length diffraction coefficients ( ildc ) is adopted to calculate the contribution of edge diffraction . in order to improve the accuracy of calculation , multi - scattering is discussed , based on the two former contributions and ray - tracing method . geometrical optics ( go ) and physical optics ( po ) are used to calculate the multi - reflection between facets and facets
对于镜面反射采用物理光学法计算其散射贡献，结合基于面元的目标模型的表示，采用离散的积分形式，将面电流积分化简为线积分，简化计算复杂度；对于边缘绕射，运用增量长度绕射系数理论计算目标边缘绕射场；在多次反射中，则以光线跟踪方法为基础，采用几何光学、物理光学相结合的方法分析考虑多次散射场。 - An idea to establish a cancellation database on the basis of the smooth of rcs of the protected target is also introduced the field scattered by facets and fringes and the multiple scattering effect are calculated by a hybridization of the theory of physical optics , equivalent currents and areal projection - physical optics , which are utilized to compute the rcs of an aeroplane
还提出了根据被保护目标rcs的平滑值确定对消数据库的思想。应用物理光学法、等效电磁流法和区域投影物理光学方法计算了面元散射场、劈边缘绕射场以及多次散射场，采用此方法计算了某飞机的rcs ，并对该目标的rcs进行了平滑处理。 - In order to obtain the complex rcs of the target quickly in high frequency band , the graphical electromagnetic computing software , greco , is used . the modification of the computing kernel code is presented . the judgement of edges of complex targets is more sufficient and the computation of edge wave based on physical theory of diffraction ( ptd ) is more exact after the modification
为了可以准确地预估雷达目标的rcs ，我们对于航天部207所的图形电磁计算软件( greco )进行了进一步的开发与包装，用borland公司的c + + builder开发了更加易于使用的基于windows操作系统的新版greco ，并且在考察了原有的greco计算内核之后，结合计算机图形学方面的理论，对greco的内核代码进行了改进，整体上使得边缘绕射场的计算结果更加准确。