High-fidelity landing simulation of small body landers: Modeling and mass distribution effects on bouncing motion

Zhang, Yonglong; Li, Junfeng; Zeng, Xia; Wen, Tongge; Li, Ziwen

doi:10.1016/j.ast.2021.107149

Cited by 23 publications

(2 citation statements)

References 29 publications

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“…采用多面体模型描述一颗不规则小天体时, 三角形侧面的数量与三角形的尺寸近乎成平方反比关系 [113] . 对于等效直径百米以上尺寸小天体, 如要通过多面体全局模型描述5 cm以上尺寸砾石和碎石等, 需体模型计算非接触弹道运动时小天体引力梯度是提高解算效率的方法之一 [117] . 另一个影响计算效率的核心因素是接触检测, 为此, 文中采用多边形接触模型 (polygonal contact model, PCM) [118] 开展着陆器多面体与小天体多面体间接触检测, 代替原有的拉普拉斯方程法.…”

Section: 小天体地表模型unclassified

Recent development of landing dynamics over small celestial bodies

ZENG,

WEN,

2024

Sci. Sin.-Tech.

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Section: 小天体地表模型unclassified

Recent development of landing dynamics over small celestial bodies

ZENG,

WEN,

2024

Sci. Sin.-Tech.

Self Cite

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“…To reduce the influence of the effective potential change, the lower release altitude is utilized in this study to focus mainly on the lander shape’s effect. Additionally, referring to the previous articles, the initial velocity of the lander is set as zero (Van Wal et al., 2017; Zhang et al., 2021).…”

Section: Parametric Simulationmentioning

confidence: 99%

Influence of the Lander Size and Shape on the Ballistic Landing Motion

Zeng

Wen

et al. 2022

Earth and Space Science

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This article investigates the ballistic landing motion and final distribution of the landers in different sizes or shapes near the small celestial body. Three typical shapes, including cubic, cuboid, and cylindrical, are considered for the landers deployed to a tri‐axial ellipsoid model. The Polygonal Contact Model (PCM) is used to detect the contact/collision, where the Hertz model is applied to calculate the continuous contact force. Different‐sized cubic landers (in the edge length of 20, 30, 40, and 50 cm) are numerically simulated to examine how the lander size influences its dynamics. The landing motion of the cuboid‐ and the cylinder‐shaped landers are then analyzed in the same technique. The heights of these asymmetrical landers are assumed to be 25, 30, and 35 cm, respectively, to illustrate the shape effect. Monte Carlo simulations are implemented for various landers to account for the surface motion randomness. The final dispersion, the outgoing velocity after the collision, the horizontal transfer distance, and the settling time are taken to be critical indicators for discussing the landing behavior, which can provide implications for the probe design of future missions.

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