Abstract
The calculation of re-entry condition and the analysis of influencing factors based on space tethered-assisted deorbit system are provided. Firstly, the process of space tethered-assisted return is described, then the dynamical model of this system and the backswing model of capsule in elliptic orbit coordinate system are established, according to Pontryagin’s maximum principle the optimal control law is presented, and the calculation of re-entry condition is given. The influence on re-entry conditions from tether mass, eccentricity, true anomaly and the altitude of the orbit are analysed. Based on the above calculation and analysis, the correlation parameters that meet the re-entry condition under the elliptic orbit are obtained. Through the study of this article, we give a reference for choosing the parameters of future tethered-assisted return system and a theoretical reference for the calculation of re-entry condition in future space tether-assisted return technology.
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