Multi - Spacecraft Output Feedback Attitude Cooperative Contro

Space technology has largely promoted the quality of human lives. Multiple spacecraft in a formation group can work together to achieve a mutual objective.Hence the attitude synchronization problem of multiple spacecraft in formation flight has caused more and more interests of excepts and scholars at home and abroad.Selecting the formation flying spacecraft as research object, this thesis addresses the coordinated attitude control of the multiple spacecraft based on output feedback,and the major contents are consisted of the following aspects.First, this thesis introduces spacecraft attitude dynamic and kinetic models,basic concept of graph theory, and related theory of Lyapunov stablity.Next, output feedback attitude control problem of spacecraft formation with input saturations is studied. In the directed topology, considering of the angular velocity can’t be measured, an attitude coordinated control law of spacecraft formation is given to make sure the attitude synchronization. Then an output feedback coordinated,And numerical simulation results verify the effectiveness of the proposed control algorithms.Then, attitude control problem of spacecraft formation based on the stateobserver is studied. First, a convergent observer is constructed to estimate the state information in a finite time. Then in the directed topology, an observer-based output feedback controller is developed. In the end, an output feedback coordinated control algorithm is given and the final consensus states are the excepted states.And numerical simulation system is built.