Robustness Issues in Feedforward Control

This paper extends the results obtained in previous work on design of feedforward control in the presence of uncertainties. Two alternative designs are compared for the rejection of a specific mesasurable disturbance: a design based on feedback compensation alone and a second design combining both feedback and feedforward action. Extension of parametric ranges of the study provide additional insight into the trade-off between achievable performance and increasing controller so-phistication.