Rejection of Non-periodic Disturbances in Repetitive Control Systems

This paper proposes a new approach to disturbance estimation based on a curvature model to improve the rejection performance of disturbances in a repetitive control system. The main feature is that the stability of the repetitive control system is guaranteed when the estimated disturbance is incorporated directly into the designed repetitive control law. Simulation results show that disturbances are rejected efficiently when this approach is used.