Contact Motion on Surface of Asteroid
Contact Motion on Surface of Asteroid
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DOI：
10.2514/1.a32939
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发表时间：
2014-12
影响因子：
1.6
通讯作者：
S. Tardivel;D. Scheeres;P. Michel;S. V. Wal;Diego Paul Sánchez Lana
中科院分区：
文献类型：
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作者：
S. Tardivel;D. Scheeres;P. Michel;S. V. Wal;Diego Paul Sánchez Lana
提出了一种模拟小行星表面球形吊舱运动的综合方法。使用三角形面的表面，小行星的最大特征（全球形状，巨石和大巨石）进行建模。较小的岩石的存在占使用岩石生成和碰撞的随机模型。描述了风化层或较硬表面上的接触动力学，包括多个接触点的情况。力，扭矩和滚动阻力系数的介绍，解释和估计。最后，这个模型被应用到一个假设的部署情况下，小行星丝川。数值模拟结果表明，登陆时间约为5小时，主要登陆盆地位于缪斯海。它还证明了小行星模型的每一个细节对于准确了解小行星表面运动和有效设计实际部署战略的重要性。
A comprehensive method for modeling the motion of a spherical pod at the surface of an asteroid is presented. Using triangular faceted surfaces, the largest features of the asteroid (global shape, monoliths, and large boulders) are modeled. The presence of smaller rocks is accounted for using a stochastic model of rock generation and collision. The contact dynamics on regolith or harder surfaces, including multiple contact points situations, are described. The force, torque, and coefficient of rolling resistance are introduced, explained, and estimated. Finally, this model is applied to a hypothetical deployment case on asteroid Itokawa. The numerical simulations show landing time around 5 h, with the main landing basin located in Muses Sea. It also proves the importance of each and every level of detail of the asteroid model for an accurate understanding of asteroid surface motion and the effective design of practical deployment strategies.