The maintainability analysis and conceptual design of On-Orbit Service (OOS) system for space station

In the complex space environment, spacecraft may stop running at any time due to failure and degradation. Carrying capacity of spacecraft is limited, and launching alternative spacecraft is costly. The use of OOS technology can effectively troubleshoot and extend service life. Space station is the large spacecraft, which is in orbit for a long time. Therefore it requires the use of OOS and maintainability methods to achieve the high reliability and long service life in orbit. This paper proposes a multi-level maintenance strategy based on the analysis of maintenance needs and the complexity of maintenance tasks. Then based on the strategy, the conceptual design of OOS system is proposed, which provides theoretical support and exploration for Chinese future space station.