摘要
小行星探测器在星体表面的稳固附着是探测任务的关键所在。以某型小行星探测器为研究对象,将离散元方法和多体动力学仿真方法相结合,建立了同时考虑缓冲机构作用和碎石层碰撞作用的耦合仿真模型,用来分析小行星探测器在碎石层的附着稳定性。而后,给出了探测器附着稳定性的综合评价参数,并在此基础上,针对典型附着工况,采用耦合仿真模型分析了探测器的附着稳定性。在特定的竖直速度下,通过全因子试验设计方法选取样本点,基于耦合仿真模型的计算结果,利用三阶多项式建立性能评价参数关于不同碎石层坡度、探测器水平速度和偏航角的代理模型,并利用代理模型确定了探测器的附着稳定性边界,分析了不同工况参数下的稳定性边界变化趋势。最后,根据稳定性边界分析结果,确定了三组恶劣附着工况,并在此基础上分析了竖直速度对附着稳定性的影响。该研究方法对于我国未来小行星附着探测任务的顺利开展具有一定的指导意义。
The stable attachment of asteroid detector to star surface is key to exploration mission. Here, a kind of asteroid detector was taken as the study object, and a coupled simulation model was established by combining the discrete element method and the multi-body dynamic simulation method considering both actions of buffer mechanism and gravel layer impact to analyze attachment stability of asteroid detector on gravel layer. Then, comprehensive evaluation parameters of attachment stability of the detector were given. Furthermore, the attachment stability of the detector was analyzed with the coupled simulation model for typical attachment conditions. Under the specific vertical speed, sample points were chosen with the full factors test design method. Based on calculation results of the coupled simulation model, third-order polynomial was used to establish surrogate models of performance evaluation parameters for different gravel layer slopes, detector horizontal speeds and yaw angles. Surrogate models were used to determine the attachment stability boundary of the detector, and analyze the change trend of the stability boundary under different working conditions. Finally, according to analysis results of stability boundary, 3 groups of severe attachment conditions were determined, and then effects of vertical velocity on attachment stability were analyzed. It was shown that the proposed study method can have a certain guiding significance for successful development of our country’s asteroid attachment detection missions in future.
作者
王辉
董洋
丁建中
刘学翱
王春洁
WANG Hui;DONG Yang;DING Jianzhong;LIU Xueao;WANG Chunjie(School of Mechanical Engineering and Automation,Beihang University,Bejing 100191,China;State Key Lab of Virtual Reality Technology and Systems,Beihang University,Beijing 100191,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第23期129-139,共11页
Journal of Vibration and Shock
关键词
小行星探测
多体动力学
离散元
耦合仿真
稳定性分析
asteroid detection
multi-body dynamics
discrete element
coupled simulation
stability analysis
