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Contact Motion on Surface of Asteroid

机译:小行星表面的接触运动

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摘要

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.
机译:提出了一种模拟球形小行星表面球果荚运动的综合方法。使用三角形刻面,对小行星的最大特征(整体形状,整体结构和大巨石)进行了建模。使用岩石生成和碰撞的随机模型可以解释较小岩石的存在。描述了在硬石或较硬表面上的接触动力学,包括多个接触点的情况。介绍,解释和估算力,转矩和滚动阻力系数。最后,该模型被应用于小行星伊藤川的假设部署案例。数值模拟显示登陆时间约为5小时,主要登陆盆地位于缪斯海。它还证明了小行星模型每个细节级别对于准确理解小行星表面运动和有效设计实际部署策略的重要性。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2014年第6期|1857-1871|共15页
  • 作者单位

    University of Colorado Boulder, Boulder, Colorado 80309;

    University of Colorado Boulder, Boulder, Colorado 80309;

    University of Nice Sophia Antipolis, Centre National de la Recherche Scientifique, 06304 Nice, France;

    University of Colorado Boulder, Boulder, Colorado 80309;

    University of Colorado Boulder, Boulder, Colorado 80309;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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