Output feedback compensator design for higher order discrete system via reduced model

In this paper a method is presented to design an output feedback compensator for a higher order discrete time system via its reduced order model. The advantages of the method are two fold: first is, the states are not required for feedback and secondly when the compensator is placed in the closed loop with the higher order system it guarantees the closed loop stability. The method is simple and can be easily implemented. The method is illustrated via a numerical example.