Sliding-Mode Predefined-Time Control for Full-Drive Rigid Spacecraft with Unmodeled Dynamics

This article devotes itself for concerning the sliding-mode predefined-time control for a rigid spacecraft system, which can be described as the full-drive rigid spacecraft system. During the predefined-time tracking control procedure, a dynamic signal and K-filters are respectively used to act their roles for restraining the unmodeled dynamics appeared in the modelling procedure, and meanwhile, a predefined-time extended observer is developed for evaluating the unavailable states of the modeled full-drive system. In the end, a predefined-time tacker is exported under the sliding-mode design framework, and the corresponding simulation reflects the availability of the presented strategy.