Application of H∞ Compensator to a First-Order Lag Plus Deadtime System with Changes in Characteristics

This paper concerns a design method for an H, compensator which achieve robust stability as well as adequate disturbance rejection and reference tracking properties. A practical and systematic design method for the H, compensator is proposed. The practical applicability of the H, compensator for a typical plant in process industries comparing with the control performance obtained by the robust PID controller is highlighted.