An exterior-point approach to the robust regional pole placement control problem with fixed-order output feedback

This paper is concerned with the robust regional pole placement control problem against time invariant polytopic uncertainties. In this paper we propose an iterative approach to design a fixed-order output feedback controller achieving the robust regional pole placement. The features of our approach are to be able to use any controller variables as an initial point and to construct a controller sequence approaching a feasible region from the outside. Numerical examples are given to show the efficiency of our approach.