Robust pole assignment of linear systems in specified regions

In this paper, we address the stability robustness of linear time invariant systems with state space models. The perturbations of concern are assumed to be time invariant, unstructured or structured. Based on stability radii, robust stability bounds are derived such that all the eigenvalues of the perturbed systems are still inside a desired region, a wedge in the s-plane or a disk in the z-plane.