The Unknown Input Observer and its Advantages with Examples
For control theorists, this provides a clear illustration of UIO's advantage in decoupling plant inputs from state estimation, though the work is incremental.
This memo reviews Unknown Input Observers (UIO) for state estimation in systems with unknown disturbances, demonstrating through three examples that the estimation error asymptotically approaches zero under dynamic disturbances.
This brief memo reviews the theory of Unknown Input Observers (UIO) for state estimation in systems subject to disturbance inputs that are not known a priori. One main advantage of the UIO is that the observer structure naturally decouples the plant inputs from the state estimation process. This advantage is highlighted in three example dynamic systems commonly found in control theory. It is shown that the estimation error for all three systems asymptotically approaches zero by application of the UIO under the influence of dynamic disturbances.