小行星探测器电磁阻尼着陆缓冲遇阻特性

doi:10.7527/S1000-6893.2022.27783

Abstract

Abstract:

Landing buffer is the basis for in-situ exploration of asteroids. The unknown surface morphology of asteroids could easily lead to overturn of the probe upon encountering obstacles during the landing process. It is therefore necessary to investigate the electromagnetic damping buffering characteristics in the obstruction encountering process. First， we establish a co-simulation model of landing buffering dynamics coupling mechanics and control， and calibrate the collision contact parameters with the neural network. Based on the established simulation model， the influence of tangential landing speed， normal landing speed， probe yaw angle， and landing inclination on the landing process is theoretically studied， and the effect of yaw angles on different landing buffer stages is explored. The main influencing factors and their influence on the overturning due to obstacle encounter are analyzed. Finally， landing buffer experiments are performed on the microgravity simulation asteroid landing buffer experimental platform to study the influence of the initial landing parameters and the landing medium on the landing buffer process， verifying the established simulation model. The error between the simulation landing buffer time and the experimental results is smaller than 15%， demonstrating the accuracy of the established simulation model.

Key words: asteroid exploration, electromagnetic damping, landing buffer, encountering obstruction characteristics, dynamic simulation

CLC Number:

V476.4

Tingzhang WANG, Qiquan QUAN, Xin AI, Dewei TANG, Zongquan DENG. Electromagnetic damping buffering characteristics of aster-oid probe upon encountering obstructions[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(13): 227783-227783.

Figures/Tables 18

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名称	材料	密度/（kg·m^-3）	泊松比	弹性模量/GPa
探测器	2A12	2 770	0.34	195.0
着陆足	304	7 930	0.25	65.5
星表介质	砂岩	2 600	0.14	23.5

偏航角/（°）	着陆倾角/（°）	切向速度/（mm·s^-1）	法向速度/（mm·s^-1）
0	0~30 （间隔5）	50~150 （间隔50）	100~200 （间隔50）
30	0~20 （间隔5）	50~150 （间隔50）	100~200 （间隔50）
60	0~15 （间隔5）	50~150 （间隔50）	100~200 （间隔50）

障碍介质	着陆介质	着陆倾角/（°）	法向速度/（mm·s^-1）	切向速度/（mm·s^-1）
砂岩	砂岩	0~30	100	50， 100， 150
砂岩	泡沫	0~30	100	100

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Electromagnetic damping buffering characteristics of aster-oid probe upon encountering obstructions

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