低空突防仿真用数字地形模型的建立  

Establishment of a digital terrain model for low altitude penetration simulation

作　　者：刘凌宇[1] 彭靖[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191

出　　处：《中国体视学与图像分析》2010年第3期245-250,共6页Chinese Journal of Stereology and Image Analysis

摘　　要：突防区域的数字地形是实现地形跟随/地形规避/威胁规避(TF/TA2)低空突防的主要信息来源。为了模拟飞行器低空突防过程中遭遇到的地形及威胁场景,建立了以规则网格高程矩阵表征的数字地形模型。通过将威胁等效为地形的方式实现了威胁信息和地形信息的融合,使低空突防时信息读取的时间和航迹优化算法的复杂性大大降低;为满足突防飞行器机动能力的限制和飞行安全性的要求,利用坡度限制方法和地形曲率限制方法对地形进行了平滑处理;采用双线性插值方法完成地形数据插值,既满足了精度要求,又保证了实时性。Digital terrain of penetration region is the main source of information when achieving the terrain following/terrain avoidance/threat avoidance in low altitude penetration.In order to simulate the terrain and threat scene in low altitude penetration,a digital terrain model represented by the rule-grid elevation matrix is established.By the way of making treat equivalent to terrain elevation,the threat and terrain information is fused to reduce the time cost when reading information and complexity of the route optimizing algorithm.To meet the aircraft maneuverability limits and the flight safety requirements,the methods of restricting slope and terrain curvature are used to smooth the terrain.The use of bilinear interpolation method to complete the terrain data interpolation does not only meet the precision demands but also ensures the real-time requirements.

关 键 词：数字地形模型 低空突防 威胁等效 平滑处理 地形数据插值 

分 类 号：V249.122.6[航空宇航科学与技术—飞行器设计]