On generalized Popov theory for delay systems

This paper focuses on the Popov generalized theory for a class of some line ar systems including discrete and distributed delays. Sufficient conditions for stabilizing such systems as well as for coerciveness of an appropriate quadratic cost are developed. The obtained results are applied for the des ign of a memoryless state feedback control law which guarantees the (expone ntial) closed-loop stability with an L-2 norm bound constraint on disturban ce attenuation. Note that the proposed results extend similar ones proposed by some of the authors [11].