Control of higher order system via its reduced model

The problem of controller design for higher order system via reduced model is investigated. The paper describes a technique for designing a stabilizing controller for the stable higher order system via its reduced order model. The method uses the parametrization of all compensators that stabilize a given plant. It is shown that the compensator which is obtained from reduced model not only stabilizes the reduced model but also the higher order system. The developed method is illustrated with a numerical example