Attitude preview control for large flexible spacecraft based on disturbance observer
Considering that the vibration of large flexible appendages for spacecraft seriously affects its attitude control,an information fusion attitude preview controller based on disturbance observer was designed.The uncertainty caused by the vibration of the flexible appendages was considered as compound disturbance to the attitude.A disturbance observer was designed to estimate the compound disturbance in real time.On this basis,the attitude preview control law of large flexible spacecraft was derived according to the information fusion theory,by fusing information such as desired trajectory and system dynamic equations,resulting in improved control performance of the spacecraft attitude system.The designed attitude control algorithm has the advantages of simple design process and easy implementation.The simulation results indicate that the designed control strategy with good control characteristics can effectively suppress the vibration of the flexible appendages,and the spacecraft attitude angle can reach the desired command quickly.
large flexible spacecraftdisturbance observerinformation fusionpreview control
万方数据
维普
