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B. Petermeier, H. Springer:
"Active bearing unit for damping of bending vibrations in rotating machinery";
in: "Ninth International Conference on Vibrations in Rotating Machinery", issued by: IMechE - Institution of Mechanical Engineers; Chandos Publishing Ltd., Oxford, 2008, ISBN: 978-1-84334-458-2, 733 - 743.

In this paper a new actuation concept for active suppression of bending vibrations in rotating machinery is proposed. One or both passive rolling bearings of a rotor are complemented by particular active bearing units that contain four piezo actuators each. Numerical investigations are performed using a Finite Element model of a test cylinder system composed of beam- and lumped mass/stiffness elements. Simulation is carried out to calculate time series of the transient cylinder deflections. For control design the H∞-technique is employed using μ-synthesis. Furthermore, for experimental prove a simple test rig system is used to practically demonstrate active damping. It is shown, that numerical simulations and experimental results coincide well and show considerable effectiveness in suppressing transient vibrations in rotating or nonrotating cylinders.