A hot swap detection method for ORU modules of spacecraft

For on-orbit replacement of ORU module of traditional spacecraft, it is necessary to set the module to be replaced to the state of power off and disabled before replacement operation. The related transactions of module have been interrupted for a long time, and the normal function of spacecraft has been greatly affected. This paper presents an on-orbit hot swap detection method for ORU modules. The hot swap detection process is described from both communication links and electrical aspects. The method is used to realize live hot swap and plug-and-play of ORU modules in spacecraft, shorten the interruption time of module services, and provide a new plug-and-play detection method for the development of plug-and-play spacecraft.