A Strategy Optimization Study of Descent and Landing Process for Manned Lunar Lander in Mid-course Separation Mode
Aiming at the descent and landing process of a manned lunar lander in mid-course sepa-ration mode,an optimization method of descent and landing strategy was proposed to reduce the pro-pellant consumption of the lunar module.Based on the analysis of safety constraints of the two mod-ules landing point,emergency flight safety constraints and propellant depletion constraints in the process of descent and landing,the optimization model and the design flow of descent and landing trajectory were proposed.The method can reduce the propellant consumption of the lunar module by iteratively solving the optimal initial descent height and the separation height of the two modules,making full use of the remaining propellant of the propelling module.The results showed that the method could effectively save propellant,and reveal the relationship between the initial descent height,the separation height of two modules and the propellant consumption of the landing stage of the lunar module under the influence of safety constraints.
manned lunar landermid-course separationdescent and landingoptimizationpro-pellant consumption
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