使用改进的Xdraw算法计算威胁源通视性  

Calculation of Threat Inter-Visibility by Using an Improved Xdraw Algorithm

作　　者：雷晓义[1] 杨任农[1] 黄震宇[1] 柴毅哲[1] 

机构地区：[1]空军工程大学航空航天工程学院,西安710038

出　　处：《电光与控制》2015年第1期105-108,共4页Electronics Optics & Control

摘　　要：低空探测雷达探测范围较小,军用领域对其进行威胁范围分析时,常将雷达辐射传播特性近似为视线特性以提高分析效率,并运用通视性计算的方法进行分析处理。通视性计算问题是指计算已知观察点的可见区域集合的问题,常用算法有R3,PRVA,PREAI,R2,Xdraw等,这些算法计算量大,计算过程复杂,不能很好地满足军用领域对威胁分析的快速高效的要求。综合分析各种算法优缺点,选取并改进Xdraw算法,进一步提高运算效率。最后,在数字高程模型(DEM)的基础上,使用VC环境做验证仿真。仿真结果表明,改进的Xdraw算法在保证精度降低不大的同时,运算速率更快,说明改进的Xdraw算法计算威胁源通视性的可行性和高效性。Inter-visibility calculation is to calculate the visible area sets of known observing points. The common methods,including R3,PRVA,PREAI,R2 and Xdraw,are complex and not adaptable for military application. In this paper,the advantages and disadvantages of each algorithm are analyzed comprehensively.The Xdraw method is selected and improved for increasing the calculation efficiency. On the basis of Digital Elevation Model（ DEM） ,simulation is made under VC environment. The result shows that the improved Xdraw algorithm can not only calculate the inter-visibility situation of surface terrain,but also compute the inter-visibility of space of any height layer precisely and quickly. Therefore,its feasibility and effectiveness for threat inter-visibility calculation are proved.

关 键 词：雷达 通视性 数字高程模型 威胁源 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计] TP391.9[自动化与计算机技术—计算机应用技术]