摘要
Abstract： In the case of Chang EⅢ high-speed flight, to ensure accurate lunar soit landing in a predetermined area, the key issue is the landing track and control strategy design. As we all know, the landing prcess e need to meet the requirements of the key point＇ s conditions, as well as minimize fuel consumption. Hence,it is of great important to find Perilune and Apolune points. Based on energy conservation and Kepler＇ s second law, we can find Perilune and Apolune points and figure out their speeds respectively. We also can calculate the location of the landing site by the conditions of minimum fuel consumption. To achieve the least energy-consuming, Chang E Ⅲ must reach above the intentended landing spot at the end of the quick-adjust stage. As a result, you can use the main constraints and optimize fuel consumption using the genetic algorithm at the attempt to calculate horizontal displacement.
