宇航学报

宇航学报 ›› 2017, Vol. 38 ›› Issue (10): 1032-1040.doi: 10.3873/j.issn.1000-1328.2017.10.003

• 飞行器设计与力学 • 上一篇    下一篇

两种着陆模式下的着陆器缓冲机构构型优化

吴宏宇，王春洁，丁宗茂，丁建中，刘学翱   

  1. 1. 北京航空航天大学机械工程及自动化学院，北京 100083；
    2. 北京航空航天大学虚拟现实技术与系统国家重点实验室，北京 100083
  • 收稿日期:2017-06-19 修回日期:2017-08-14 出版日期:2017-10-15 发布日期:2017-10-25
  • 基金资助:

    国家自然科学基金重点项目（51635002）

Configuration Optimization of Landing Gear under Two Kinds of Landing Modes

WU Hong yu, WANG Chun jie, DING Zong mao, DING Jian zhong, LIU Xue ao   

  1. 1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
    2. State Key Laboratory of Virtual Reality and Systems, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2017-06-19 Revised:2017-08-14 Online:2017-10-15 Published:2017-10-25

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摘要：

分别建立了着陆器在非0高度关机着陆模式下、触地关机着陆模式下的动力学仿真模型。基于仿真模型，应用全因子实验设计方法分析了着陆器在两种着陆模式下的软着陆性能，得到了软着陆极恶劣工况。为了获得软着陆性能最佳的着陆器设计方案，研究了着陆缓冲机构构型参数对软着陆性能的影响。结合仿真模型与实验设计方法获取样本点，构造了极恶劣工况下描述软着陆性能指标值、着陆缓冲机构构型参数之间映射关系的响应面模型。之后利用响应面模型与第二代非劣排序遗传算法(NSGA-II)实现了着陆缓冲机构构型参数的优化。将优化后的参数代入仿真模型验证，着陆器在两种着陆模式下的抗翻倒能力、底面抗损坏能力均得到提升。

关键词: 腿式着陆器, 着陆模式, 动力学分析, 响应面模型, 优化设计

Abstract:

The dynamic simulation models of a lander under two kinds of landing modes, namely, shutdown at the specified height landing mode and shutdown at the touchdown landing mode, are established. Based on the simulation models, the soft landing performance of the lander under two kinds of landing modes is analyzed by full factorial design, and the worst landing conditions are obtained. In order to get the optimal soft landing performance of the lander, the influence of the configuration parameters of the landing gear on the soft landing performance is studied. Aiming at worst landing conditions, the sampling points are obtained by using the simulation models and experiment design method, and the response surface models which reflects the mapping relationship between the configuration parameters of the landing gear and the values reflecting the soft landing performance are established. Then the configuration parameters of the landing gear are optimized based on the response surface models and the non-dominated sorting genetic algorithm II (NSGA-II). Finally, the simulation is carried out under two kinds of landing modes by using the optimized parameters. And it shows that both the ability of the lander to resist being overturned and the ability of the bottom of the lander to resist being damaged are enhanced.

Key words: Legged lander, Landing modes, Dynamics analysis, Response surface model, Optimization design

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