Firstly, based on simplified dynamics of lunarsoftlanding, an explicit guidance law was induced by solving the special two-point boundary value problem.
首先，基于简化的软着陆动力学模型，通过求解特殊两点边值问题，给出了一种实时显式制导方法。
2
On Jan. 9, 1968, the Surveyor 7 space probe made a softlanding on the moon, marking the end of the American series of unmanned explorations of the lunar surface.
Based on minimal fuel principle, the switching curve of ignition is confirmed by using optimization theory, and a braking scheme is designed for the process of the lunar probe vertical softlanding.