Abstract:In view of the particularity of the space environment in which the space station is located, the importance of the docking mechanism to the normal operation of the space station and the increasing requirements of spacecraft reliability, it is proposed that the reliable design should be added to the docking control system to realize the high quality and stable operation of the whole mechanism. On the basis of completing normal control functions, quadruple redundancy is adopted in the system including active/standby dual hot backup, switching of automatic or manual control mode, two-line transmission of automatic control shutdown command and three-to-two judgment working mode. The specific judgment process of the quadruple redundancy design is explained in detail. The simulation verification of the control system software shows that the docking control system designed by the method described in this paper has high reliability and fault tolerance capability.