航迹规划中数字地图的设计与应用

Design and application of airborne digital map in the flight vehicle low altitude penetration

针对低空突防中地形因素和敌方威胁的潜在影响 ,研究了在安全保障前提下 ,飞行最小危险曲面 (SOMR)及该曲面拟合与数字地图生成的方法 ,并通过坐标变换将飞行器的运动方程变换到该曲面上 ,从而将地形和威胁因素引入飞行器运动方程。运用极小值原理 ,提出了飞行时间 -地形遮蔽最优 TF/ TA2 轨迹性能指标。给出了地形数据库加载模型 ,并完成了将高程数据库加载到航迹规划中的仿真。仿真结果表明 ,该算法不仅能紧密跟随地形 ,而且能自动回避威胁和障碍。

Producing an airborne digital map database is one of the key technologies that perform flight vehicle low altitude penetration. The method to produce minimal threading surfaces its fitting surfaces and digital maps are studied under the sagety limitation. The motion equations of flight vehicle are transferred to the safety surface, so that terrain and threating factors are introduced to the analysis of vehicle motion. Using minimal principle sets up a performance index of optimization on flight time to terrain avoidance (TF/TA 2). Loading model of terrain database is given, and simulation of loading height database to route planning is completed. The simulation results show that the trajectory is generated by the algorithms can automatically avoid threat and obstacle while it follows terrain.