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New approach to vibration control using piezo-ceramic elements

Ein neuer Ansatz zur Schwingungsregelung mit piezokeramischen Elementen
: Brückner, B.; Schönecker, A.; Kaufmann, M.; Bretthauer, G.

Drews, P. ; European Center for Mechatronics; IEEE Industrial Electronics Society:
Mechatronics and Robotics '04. Vol.2 : Aachen - Germany, September 13 - 15, 2004
Aachen: Eysoldt, 2004
ISBN: 3-938153-30-X
ISBN: 3-938153-50-X
International Conference on Mechatronics and Robotics (MECHROB) <2004, Aachen>
Fraunhofer IKTS ()
Euler-Bernoulli-Balken; Federsteifigkeit

Many mechanical structures of mechatronic systems suffer from unwanted vibrations. The present paper concerns vibration control of a Euler- Bernoulli beam using piezo-ceramic actuators. The intention is to eliminate the steady state motion at a prescribed location in a continuous system like a beam under the influence of an external harmonic excitation. The method is known as nodal control. A new system set-up is introduced. The actuator is integrated in the structure's clamping. For this system a model based on continuum mechanics is derived. It is capable of characterizing the structure's dynamics, the coupling of piezo-ceramic actuators and gives a mathematical solution in a closed form for the needed parameters to shift the vibration node as desired. The solution considers various types of commercially available piezo-ceramic actuators. Furthermore an experiment is designed to validate the mathe matical model. The experiments are performed with a variety of metal beams with applied piezo-ceramic patch actuators. It is confirmed that the theory developed here produces accurate results. The model can serve as a vital tool for enhanced investigations on shape and vibration control of beam structures.