The Parametrization of All Disturbance Observers for Time-Delay Plants with Input Disturbance

In this paper, we examine the parametrization of all disturbance observers for time-delay plants with any input disturbance. The disturbance observers have been used to estimate the disturbance in the plant. Several papers on design methods of disturbance observers have been published. Recently, the parametrization of all disturbance observers for time-delay plants with any output disturbance was clarified. However, no paper examines the parametrization of all disturbance observers for time-delay plants with any input disturbance. In this paper, we propose parametrizations of all disturbance observers and all linear functional disturbance observers for time-delay plants with any input disturbance.