基于三角面元模型的复杂目标棱边提取

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。

An Extraction Scheme of Target Edge Based on Triangular Patches

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.