Research on deep maintenance of equipment and optimization analysis of supporting resources in space

With the longer period during future manned space missions, the effective implementation of on-orbit maintenance and repair is a necessary means to guarantee the whole life cycle availability of equipment in space. In this paper, we conducted an investigation for on-orbit maintenance and security resource strategies of the International Space Station and other space equipment. And we made a brief description and analysis of in-orbit maintenance technology development in the International Space Station. On this base, we put some suggestions on the strategy of on-orbit maintenance and resource optimization for Chinese space station. Based on the engineering practice, this paper provides more practical suggestions for the deep maintenance and resource security of space equipment in China.