Drag Free Control System Design Based On The Relative Motion Description

This paper mainly focused on the Drag free control system design based on the relative motion description. In this paper, the state space description model of the dynamics of the drag free satellite was established. Based on the analysis of controllability and observability, the state feedback control law was designed. Finally, considering the micro thruster configuration and output characteristics, the drag free control simulation was done. The simulation results showed that the control system based on the relative motion of the drag free spacecraft can meet the requirements of the control precision and the thrust commands never exceed thrust range.