Formation Timecraft Attitude Control With Limited Time And Attitude

With the development of network communication and computer science and technology in recent years,the attitude coordination control of spacecraft formation flight has attracted the great attention of experts and scholars in the field of mathematics and control.A lot of useful results are obtained for the attitude coordinated control of the spacecraft with normal worked actuators.Considering the fault of the actuators,this paper makes an analysis and research on the finite-time attitude coordination control of the formation spacecraft system in the presence of disturbances.The main contents are organized as the following.First,the mathematical models of the spacecraft system are introduced,including the attitude dynamics model and the kinetics model,the basic concepts of algebraic graph theory,and the related definitions and lemmas used in this paper.Secondly,when the actuators are working normally,the attitude synchronization and cooperative tracking of the formation spacecraft system are studied.In the presence of external disturbances,an adaptive neural network controller is designed to ensure that the system achieves stability in a finite time.And then,considering the failures of actuators,the attitude fault tolerant control of the formation spacecraft system is studied.First,considering the bias faults,an adaptive neural network control law is given.Then considering the actuator partial failure and bias fault,the control law is presented to guarantee the system to achieve finite time stability based on Lyapunov stability theory and finite time theory.Finally,the numerical simulation of the control law is performed to verify the effectiveness of the proposed control law.