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Development of horizontal sliding model test facility
for footpad’s lunar soft landing |
ZHONG Shi-ying1,2, WU Xiao-jun3, CAI Wu-jun1, LING Dao-sheng1,
JIANG Zhu-jin1, WANG Shun-yu1 |
1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University ,Hanzhou 310058,China;
2. Shenzhen Expressway Engineering Consultants Company Limited, Shenzhen 518026, China;
3.Suzhou Xingang Comstruction Group， Sazhou 205011， China |
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Abstract Horizontal sliding model tests for soft landing mechanisms were conducted to measure the slip characteristic for lunar lander after landing impact occurring in touchdown process. The model test facility, formed by transmission control system, towing cylinder and limiting displacement system, measuring system, model box system, was used to research the slip characteristic under different landing velocities, footpad angles and landing points. The drive control system achieves any requirement horizontal sliding velocity|the cylinder and displacement restrictor system realizes the requirement pressure and depth|measuring system measures the sliding force, axial force, sliding velocity, displacement and footpad angle|and model box system compoundes the requirement test foundation bed. A series of tests were carried out under footpad level, depth 10 mm. The results show that linear relationship between sliding force and axial force is excellent, and their distribution is similar to National Aeronautics and Space Administration (NASA) results. So the horizontal sliding model tests device is reliable.
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Published: 01 March 2013
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月面软着陆足垫水平拖曳模型试验装置研制
为解决月球软着陆探测器在软着陆冲击完成到着陆完全稳定过程中的滑移特性问题,研发软着陆机构水平拖曳模型试验装置.该装置有传动控制系统、拖曳筒体的汽缸和限位器装置、量测系统、模型箱系统等,用于模拟软着陆过程中不同着陆速率、足垫冲击角度以及不同着陆地点下,软着陆机构水平滑移特性测试.由传动控制系统实现设定的水平拖曳速率|拖曳筒体的汽缸和限位器装置实现压力和刺入深度,量测系统对拖曳力、轴力、拖曳速率、刺入深度为和足垫转角进行测量,模型箱系统可配制任意要求的试验基床.开展了足垫水平、刺入深度10 mm的系列试验,结果表明:拖曳力与轴力呈现线性关系,两者分布与美国国家航空航天局(NASA)试验结果相似,试验装置性能可靠.
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