月面数字地形构造方法研究

月面巡视探测器着陆区域的地形将对其产生重要的影响。文章对月面数字地形构造方法进行了研究。首先,对月面典型地形特征石块和撞击坑的分布规律和典型形状进行了分析。其次,说明了数字地形的生成流程。再次,先后利用两种方法确定石块和撞击坑的直径,在此基础上构建了数字地形。一种方法是根据巡视器的越障能力确定石块和撞击坑直径,该方法可在一定程度上满足巡视探测器移动性能试验需求;另一种方法是随机生成石块和撞击坑的直径,使生成的地形符合月面的实际情况,不仅可以应用于巡视探测器的移动性能试验,而且也可以应用于路径规划和着陆器着陆过程的模拟。

Constructing methods for lunar digital terrain

The topographic condition of the selected landing site on the Moon is a very important factor in the design of lunar rover. The constructing methods of the lunar digital terrain are studied in this paper. Firstly, the distribution and idealized shapes of blocks and craters of lunar surface as typical topographical features are given and modeled. Secondly, the flow chart of lunar digital terrain is illustrated. Thirdly, two methods are compared. The first method predefines diameters of blocks and craters according to the terrainability of the rover, and the resulted digital terrain can satisfy the simulation requirements of lunar mobility. The second method randomly defines diameters to fit the real lunar topography. The second method can be used not only in mobility test of lunar rover, but also for path planning of rover and descent of lunar lander.