Robust controller design with fixed-order controllers using FNFR models

This paper proposes a new fixed-order controller design method for robust control. The control problem considered in this paper is formulated as a model matching problem with robust stability conditions and the problem is reduced to a convex optimization problem by using nonparametric models represented by a finite number of frequency responses (FNFR models). Finally, some numerical examples are given to show the effectiveness of the proposed method.