基于数字地图预处理的低空突防飞行路线规划

地形跟随/地形规避/威胁回避TF/TA²(Terrain Following, Terrain Avoidance, Threat Avoidance)路线规划是低空突防研究的关键技术.地形信息存贮在数字地图中.为保证所设计路线对飞行器来说是可实现的,研究了数字地图的预处理,把地形、威胁及飞行器性能等信息融合构造了虚拟的地形表面.预处理包括数据文件压缩、威胁信息转化为地形信息、数据插值、及地形的平滑处理.通过设计综合TF/TA²的指标函数、根据A^*算法对其转化,并采用优化方法,可实现三维TF/TA²路线规划.仿真结果证明了算法的有效性.

Path planning for penetrating aircraft to fly at low altitudes based on technology of digital elevation map

Path planning using TF/TA 2 (terrain following, terrain avoidance, threat avoidance) technology is the key problem for the research in penetrating aircraft to fly at low altitudes. The terrain information is stored in a real digital map. To make sure the designed path applicable for the aircraft, preliminary treatment for the digital map was researched. A virtual terrain surface was constructed by combining the information of terrain, threat and aircraft performance. The treatment included compressing the original data file, transforming threat information to terrain height information, interpolating data at the point where the original terrain information could not be got, and smoothing the terrain surface. By devising a cost function considering the requirements of TF/TA 2, translating its form to the A * algorithm, and using some optimization methods, three-dimensional path generation for the vehicles using TF/TA 2 could be realized. The simulation results demonstrate the validity of the algorithm.