Design of Space Transit Transportation Task Based on Nonsingular Finite-Time Control

In order to solve the problem of space station’s limited space-ground transportation capacity, this paper studies the space station transit transportation task based on the space tether system. First, the return mission of the test capsule is designed; Then a bead model of the system in near-circular orbit is established; In order to release the test chamber to the specified position under certain conditions, a non-singular fast finite-time closed-loop tracking controller is designed. At the same time, the actual release error is considered, and it is compared with the nominal expansion control law of the tether system under a near circular orbit.; Finally, the simulation results and analysis show that the designed finite-time controller can well deploy the tether release test capsule to the designated position and re-enter the atmosphere. The use of the space tether system to realize the space station load transfer transportation task can provide a good application platform for the space station technology.