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摘要: 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.最后给出了一种易于实现的次优制 导律.Abstract: 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.
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Key words:
- Lunar soft landing /
- minimal fuel control /
- guidance law
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