High Precision Satellite Attitude Tracking Control via Iterative Learning Control

摘要

In this Note, an anticipatory ILC scheme in combination with a feedback control law is proposed for attitude tracking for a satellite with a repeating ground track orbit. The feedback control law is used to ensure stability and compensate for nonrepeating disturbances, and the anticipatory ILC scheme is used to reject the effects of the repeating disturbances, such as atmospheric drag, gravity gradient, magnetic torque, and solar radiation pressure. The convergence of the proposed anticipatory ILC scheme is studied for the attitude tracking system. Simulation results show that the attitude tracking accuracy can be greatly improved m both the attitude maneuver phase and attitude stabilitation phase by using the anticipatory ILC scheme.