月球着陆器软着陆机构着陆稳定性仿真分析  

Touchdown Stability Simulation of Landing Gear System for Lunar Lander

作　　者：朱汪[1] 杨建中[1] 

机构地区：[1]中国空间技术研究院总体部,北京100094

出　　处：《宇航学报》2009年第5期1792-1796,共5页Journal of Astronautics

摘　　要：介绍了软着陆机构仿真模型,提出了着陆稳定性判据和稳定性边界的离散化搜寻策略,并以实际算例给出了由着陆器着陆瞬时的竖直速度、水平速度、偏航角和月面倾角等主要影响因素确定的着陆稳定性边界。分析结果表明:对称着陆比非对称着陆更稳定;横向速度较大时支柱联接点容易发生强度破坏;当着陆面存在坡度时,横向速度沿下坡方向相对于沿上坡方向而言,着陆器更容易翻倒。Landing gear system model was presented. Touchdown stability criteria was established. Discretization searching method was developed. With four main factors of the vertical and horizontal velocity, yaw angle of the lander and lunar surface slope at the impact moment, touchdown stability boundaries were derived. Analysis results show symmetrical landing mode is more stable than unsymmetrical one and strength failure of connection points for struts easily occurs at relatively high horizontal velocity. Compared with uphill horizontal velocity instance, the downhill one overturns more easily at a slope.

关 键 词：着陆稳定性 着陆冲击 软着陆机构 月球着陆器 

分 类 号：V47[航空宇航科学与技术—飞行器设计]