Similar to the guidance of launch vehicles, a uniform gravity field on lunar sur face is assumed.An explicit guidance law for powered descending phase is propos ed to minimize the fuel consumption.

• 参考运载火箭制 导过程的分析方法，假设月球为一均匀引力场，以燃耗最优性为出发点，提出了一种用于软 着陆动力下降过程的显式制导律。