Multi-Spacecraft Pursuit-Evasion-Defense Strategy Based on Game Theory for On-Orbit Spacecraft Servicing

In the last decade, technologies such as spacecraft's navigation and guidance, rendezvous and docking have gradually matured. Moreover, research on spacecraft with autonomous maneuvering and intelligent decision-making capability for on-orbit servicing is also increasingly receiving more attention. With the rapid development of new space industry in particular large scale small satellite constellation, spacecraft that have the ability to avoid collisions, and on-orbit servicing spacecraft have become an important topic. Based on the game theory, this paper studies the process of terminal approach and rendezvous in the mission of spacecraft on-orbit servicing by taking terminal zero effort miss distance as the cost function. The established game control strategy is formulated differently from the traditional bilateral game as multiple spacecraft coexist in constellation have been taken into consideration. To reduce the control difficulty caused by the unknown terminal approaching time and the time to avoid collision, the time equation is established by calculating the corresponding time node to improve the designed game control strategies. Simulation study has been conducted and the results show the effectiveness of the proposed game control strategies.