Robustness of sampled-data control systems having parametric uncertainty: a conic sector approach

The authors consider the robustness of sampled-data control systems when the open-loop system is modeled by a family of plants having affine or interval uncertainty structures. Using the conic sector approach as adapted to sampled data systems, they give a sufficient condition for robust stability which depends only on edge parameters in the case of affine uncertainty and on vertex parameters when interval uncertainty is assumed