This paper focuses on the active vibration control of flexible rotors by piezo actuators located at the bearings. At first general relations are derived, that allow to specify the required power and dimensions of the actuators from the balance quality factor of the rotor and the stiffness of the system. Second, two control concepts, integral force feedback and robust control, are compared. The design procedure of the robust µ-synthesis controller including uncertainty modelling and selection of weighting functions is described. Experimental results obtained from a simple test rig are shown. Finally, the design is illustrated by an realistic example.
The Idea of the Selection of PZT-Beam Interaction Forces in Active Vibration Protection Problem
