The resulting controller has the structure of the optimal estimator/ regulator with the addition of generalized integral control driven from the innovation. It is easily verified that the number of open loop integrations within the controller transfer function corresponds directly the order of the polynomial disturbance estimator. We see then that type-N servo-response is realizable, based upon the Nth order disturbance estimator and the ability to cancel the disturbance input exactly. At this point, it is important to note that other problem formulations [3,4,5] also yield the desirable integral action within the state space framework as obtained here. In one form or another, states are added to the standard regulator to increase the order of the overall system. It is, however, less obvious how the other formulations can estimate inertial input from the appended states without the preceding development.