Multi-spacecraft System Finite Time Attitude Cooperative Control

Space technology has penetrated into every corner of human life,and has played a considerable role in promoting people's lives.The formation flying spacecraft can cooperate through multiple spacecraft together to complete a complex task,so in recent years,attitude coordination control problem of multiple spacecraft system has aroused widespread concern of many scholars.In this paper,multiple spacecraft is chosen as the research object,and the finite-time coordinated attitude control of multiple spacecraft is deeply studied,and the following work are mainly completed.First,the spacecraft attitude dynamic,kinetic models,graph theory basic con-cept and Lyapunov stability theory were introduced.Second,A distributed adaptive control law is designed under the directed topo-logical structure,and there is interference in the external conditions.The system tracking control is completed by the control law within finite time.Then,The proof of numerical simulation for control law is performed.And the simulation results show the control law are the feasibility and effectiveness.Finally,the sliding mode attitude control law is proposed,with external distur-bance,to solve the problem of multiple cooperating spacecraft attitude control in this paper.The control law can accomplish spacecraft attitude synchronization with-in finite time.The Adaptive attitude cooperative control law have been proposed under disturbance and model uncertainty,and it has robustness for disturbance and model uncertainty.According to the graph theory and Lyapunov stability theory,the control law achieves closed-loop system' s stability in finite time.It is shown that the results of numerical simulation confirm the feasible of control law.