This paper deals with a robust vibration control problem of a flexible structure with parameter variations. We use the six-storied structure as controlled object, with a pair of hybrid mass dampers. We use a descriptor form to describe parameter perturbations independently and apply μ-synthesis to design of the feedback controller. We show the performance of the μ-synthesis controller with descriptor form compared with that of the conventional μ-synthsis. This research work has proved that μ-synthesis with descriptor form is superior to the conventional μ-synthesis for active vibration control with mass dampers.
