中文摘要：

以对称分布四腿悬架式月球着陆器为研究对象,建立了着陆器软着陆过程六自由度动力学模型并改进了月壤摩擦系数模型；在以上动力学模型基础上,以月球着陆器为例编制了着陆器软着陆六自由度动力学分析程序,利用该程序分析了探测器全机月面软着陆性能,重点研究了动力学模型中的月面等效弹性系数、月面摩擦系数和月面倾斜角度等参数对探测器着陆性能的影响.研究表明上述影响因素对着陆器着陆缓冲性能影响显著,通过对以上参数的合理选择可以有效缓解月球探测器月面软着陆的着陆冲击过载.

英文摘要：

Symmetrical four-legged suspension lunar lander as the research object,a six-degree-of-freedom dynamic model is established and the model of the lunar soil friction coefficient is improved.Based on the above dynamic models,six degrees of freedom dynamic analysis program on lunar lander soft-landing is applied to analyze soft-landing performance of total lunar lander.The parameters about lunar surface equivalent elastic coefficient,frictional coefficient,inclination angle and so on are studied to analyze the influence on landing performance of the lunar lander.The results show that landing and buffering performance is influenced dramatically on the above factors,and reasonable parameters are chosen to relieve effectively the impact overload of lunar lander soft-landing.