Variable Coefficients PD Adaptive Attitude Control of Video Satellite for Ground Multi-Object Staring Imaging

摘要

In this paper, the attitude control problem of the video satellite on the ground multi-object staring imaging is studied. On condition that the expected yaw angle is always zero, the expected attitude and angular velocity of the video satellite are solved. The mathematical model of attitude tracking is established based on quaternion and angular velocity. The asymptotic stability of the control model is also proved by the Lyapunov function. Then a variable coefficient PD adaptive controller is designed based on genetic algorithm. The simulation results show that under the condition of disturbances and errors, this method can realize the staring imaging of ground object with zero yaw angle. For the task of ground multi-object staring imaging, the control time can be greatly reduced under the premise of accuracy requirement by using this control method, which will improve the efficiency of the satellite to star imaging significantly.