月球探测器重力转弯软着陆的最优制导

OPTIMAL GUIDANCE FOR LUNAR GRAVITY-TURN DESCENT

对于月球表面重力转弯软着陆过程 ,应用极大值原理研究了最优制导律 ,证明了其在着陆过程中不存在奇异状态 ,并且至多进行一次开关切换 .最后 。

The maximum principle is utilized to generate an optimal guidance law for lunar gravity-turn descent. It is shown that there exists no singular arc for the problem and there is at most one switching during landing. Finally, an easily-mechanized near optimal guidance law is presented.