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Proceedings Paper

Multimode vibration reduction concept for machine tools and automotive applications
Author(s): Reimund Neugebauer; Welf-Guntram Drossel; Burkhard Kranz; Holger Kunze
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Paper Abstract

This paper reports a numerical and experimental study on a new multi mode vibration reduction concept for struts of machine tools or shafts of automotives. The example described in detail validates this new concept for high dynamic parallel kinematic struts. The structural advantages of parallel kinematic mechanisms are undisputed. However statical and dynamical bending and torsional loads must be considered during the design process of the structure and thus effect the shape of the strut geometry. The here described new actuator concept for multi mode vibration reduction is to influence these bending and torsional loads. It uses piezopatches based on the MFC technology licensed by NASA. Initial simulation and experimental tests were done at an one side clamped aluminium beam with applicated 45°-MFC's on both sides. Simulation results show, that driving the piezos in opposite direction leads to a bending deflection of the beam, driving them in the same phase leads to a torsional deflection of the aluminium beam. Experimental measurements confirm the simulation results. The benefit we get is a decreased number of actuators for multimode vibration reduction. Likewise these actuators allow the separation or selective combination of bending and torsion. This new actuation concept is not limited on beams. Further simulations for cylindrical struts result in a design of a MFC-ring with eight segments with changing fiber orientation for separation of bending and torsion on struts and shafts. The selective controlled activation of each of the segments leads to bending in x-direction, bending in y-direction or torsion.

Paper Details

Date Published: 5 May 2005
PDF: 9 pages
Proc. SPIE 5762, Smart Structures and Materials 2005: Industrial and Commercial Applications of Smart Structures Technologies, (5 May 2005); doi: 10.1117/12.605835
Show Author Affiliations
Reimund Neugebauer, Fraunhofer Institute for Machine Tools and Forming Technology (Germany)
Welf-Guntram Drossel, Fraunhofer Institute for Machine Tools and Forming Technology (Germany)
Burkhard Kranz, Fraunhofer Institute for Machine Tools and Forming Technology (Germany)
Holger Kunze, Fraunhofer Institute for Machine Tools and Forming Technology (Germany)


Published in SPIE Proceedings Vol. 5762:
Smart Structures and Materials 2005: Industrial and Commercial Applications of Smart Structures Technologies
Edward V. White, Editor(s)

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