© 1997 by Institute of Mathematics and its Applications
Robust stabilization of timevarying infinite dimensional systems
Institute of Mathematics of the Romanian Academy P.O.Box 1764, Bucharest, RO70700, Romania
This paper solves the problem of robust stabilization of a class of time-varying infinite dimensional systems with respect to perturbations in a normalized left-coprime factorization. The class of time-varying infinite dimensional systems is that described by a causal evolution operator on a Hilbert space. Our approach is based on the general YakubovichPopov type theory, instead of the Nehari problem, both for estimating of the robustness radius and for the construction of a suboptimal robust stabilizing controller.