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Acta Armamentarii ›› 2013, Vol. 34 ›› Issue (8): 1046-1050.doi: 10.3969/j.issn.1000-1093.2013.08.020

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Study on Influence of Impacted Craters on Landing Performance of Lunar Lander

HU Jian-guo1, MA Da-wei1, LE Gui-gao1, CAI De-yong2   

  1. 1. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China;2. Unit 71897 of PLA, Xinyang 464194, Henan, China
  • Received:2012-11-02 Revised:2012-11-02 Online:2013-10-14
  • Contact: HU Jian-guo E-mail:super-jianguo@163. com

Abstract:

The attitude of lunar lander after soft landing is a premise foundation of ascender's stable take-off. The study on influence of impacted craters on landing performance of lunar lander has an important significance to ascender's stable take-off. The nonlinear mechanics characteristics of GRC-1 lunar soil are simulated by the finite element method (FEM), and the effectiveness of the simulation method is verified by comparing the simulation results with the triaxial test results in Ref. [13]. A dynamics model of lunar lander landing process is established based on the lunar soil nonlinearity, residual stress of retro-rocket,attitude control forces and gravity. Finally, the influence of impacted craters on the attitude of lunar lan- der after landing is studied by taking a four-legged hanging rack lander as a research object. The results show that the landing attitude angle increases with the increase in impacted crater depth, and the impacted crater depth should not exceed 600mm in order to ensure stable take-off of ascenders on the lunar surface.

Key words: spacecraft structure and design, lunar soil, lunar lander, impacted crater, landing attitude, nonlinearity, constitutive model

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