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首页> 外文期刊>Journal of Spacecraft and Rockets >Simulation of Nonspherical Asteroid Landers: Contact Modeling and Shape Effects on Bouncing
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Simulation of Nonspherical Asteroid Landers: Contact Modeling and Shape Effects on Bouncing

机译：非球形小行星着陆器的仿真：弹跳的接触模型和形状效应

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摘要

This paper presents a methodology for the fast, parallelized simulation of the bouncing deployment of lander/rover probe to an asteroid or comet. The target asteroid or comet is represented implicitly with a signed distance field, allowing for fast collision detection with high-resolution shape models. The gravity field of the target body is voxelized to make run-time computations efficient. Collisions and contact motion between a probe with arbitrary shape/inertia and the target body are evaluated using a hard-surface contact model with restitution and friction. The shape, gravity, and contact models are well suited for parallel implementation on a high-end graphics processing unit found in modern personal computers, which enables broad but detailed studies with a relatively large amount of simulations. Probe deployment to asteroid Itokawa is simulated to examine the trends in the motion of different probe shapes. Similarly, the effect of variations in the surface interaction coefficients and probe mass distribution are identified. These results are compared and contrasted with previously observed trends in the motion of strictly spherical probes and have implications for the general design of small-body surface exploration probes.
机译：本文提出了一种快速，并行模拟着陆器/流动站探测器向小行星或彗星弹跳部署的方法。目标小行星或彗星用带符号的距离场隐式表示，从而允许使用高分辨率形状模型进行快速碰撞检测。对目标物体的重力场进行体素化以提高运行时计算的效率。使用具有复原力和摩擦力的硬表面接触模型，可以评估具有任意形状/惯性的探针与目标物体之间的碰撞和接触运动。形状，重力和接触模型非常适合在现代个人计算机中的高端图形处理单元上并行执行，从而可以通过大量模拟来进行广泛而详细的研究。模拟将探测器部署到小行星丝川，以检查不同探测器形状的运动趋势。类似地，确定了表面相互作用系数和探针质量分布变化的影响。这些结果与以前观察到的严格球形探针运动的趋势进行了对比和对比，对小体表面探测探针的总体设计具有影响。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2020年第1期|109-130|共22页
  • 作者

    Van wal Stefaan; Reid Robert G.; Scheeres Daniel J.;

  • 作者单位

    Japan Aerosp Explorat Agcy Inst Space & Astronaut Sci Dept Space Flight Syst Chuo Ku 3-1-1 Yoshinodai Sagamihara Kanagawa 2525210 Japan;

    CALTECH Jet Prop Lab Mobil & Robot Syst 4800 Oak Grove Dr Pasadena CA 91109 USA;

    Univ Colorado Smead Dept Aerosp Engn Sci 429 UCB Boulder CO 80309 USA;

  • 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
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