关键词: 小行星探测, 电磁阻尼, 着陆缓冲, 遇阻特性, 动力学仿真

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