Application of optimal control to perfect model following

Linear optimal control is applied to a model-following problem where a plant, subject to parameter variations, is required to follow the response of a given model to an arbitrary input. A fixed-gain control configuration is obtained for any model input that provides model for a given set of plant parameters. The sensitivity of the system to plant parameter variations is reduced by formulating a type-one perfect model-folio wing system. The existence of feedforward gains for perfect model following is discussed and the results are applied to an aircraft control problem.