Research and Implementation of Spacecraft On-Board Software Maintenance Based on TMR System

With the development of China's space industry, embedded software has been widely used in spacecraft. In view of the high reliability and maintainability requirements of space missions, we need to focus on the key problem of on-board maintenance of embedded software. To satisfy the on-board maintenance requirement of real time embedded system, this paper proposes an implementation method of on-board software maintenance in triple modular redundancy system. This method adds three-machine communication management module to the traditional on-board maintenance software, and uses three-machine communication interface to transmit telecommand data to realize the on-board maintenance function of the backup machine. After testing and verifying, this method can complete software maintenance for the backup machine while ensuring that the system works without interruption and meets the requirements of continuous work.