低空突防用数字地图信息的融合处理

数字地图是自主式ＧＰＳ／ＭＡＰ地形跟踪／地形回避、威胁回避（ＴＦ／ＴＡ＾２）低空突防系统中实时航迹优化的主要信息来源。为简化实时透迹优化算法，减少机载数字地图的存储空间，文中提出了一种把威胁等效为地形的方法，并在此基础上进行了低空突防用数字地图的地形、地物和威胁信息的融合，得到了一种综合地形高程数据。在此综合地形高程数据上，只需采用地形跟踪／地形回避（ＴＦ／ＴＡ）最优航迹算法，便既可实现地形回避，

Digital Map Information Fusion in Low Altitude Penetration System

Digital map is the important source of information for real time flight path optimization in autonomous terrain following/terrain avoidance/threat avoidance (TF/TA 2) low altitude penetration system with GPS/MAP. This paper proposes a method that can change threat into equivalent terrain and then the information about terrain, ground objects and threats in digital map are integrated into a kind of equivalent terrain elevation data. Only by applying optimal terrain following/terrain avoidance (TF/TA) trajectory algorithm with the integrated terrain elevation data, both terrain avoidance and threat avoidance are realized. Hence, the real time flight path optimization algorithm is simplified and the memory capacity of digital map system is saved due to information fusion. In addition, the lonely peaks and ground objects are processed alone and associated with the integrated terrain elevation data in the memory. This processing method is advantageous to saving the memory capacity of airborne digital map system and making good use of the avoidance maneuverability of aircraft.