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Active component and control design for torsional mode vibration reduction for a parallel kinematic machine tool structure

 
: Neugebauer, Reimund; Wittstock, V.; Bucht, A.; Illgen, A.

:
Postprint urn:nbn:de:0011-n-708611 (999 KByte PDF)
MD5 Fingerprint: 12282a2dacf4c31b7fa5bacf1aec1f12
Copyright 2008 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Created on: 19.4.2011


Porter Davis, L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Industrial and Commercial Applications of Smart Structures Technologies 2008 : 09.-13. März 2008, San Diego
Bellingham, WA: SPIE, 2008 (SPIE Proceedings Series 6930)
ISBN: 978-0-8194-7116-1
Paper 69300F
Conference "Industrial and Commercial Applications of Smart Structures Technologies" <2008, San Diego/Calif.>
English
Conference Paper, Electronic Publication
Fraunhofer IWU ()
design factor; piezo-based component; parallel kinematic machine; machine tool; active damping

Abstract
The paper reports the holistic development of an active piezo-based component concerning the mechanical design and the control. The active component is used for the reduction of torsional vibrations in a strut of a tripod parallel kinematic machine. By means of this new component the main drawback of the x, y, z-tripod structure can be eliminated. A calculation shows the compliance of the connection between actuators and the adjacent mechanical parts as the most sensitive point of the design. The characteristic values of the piezo actuator were transformed into the active component with the help of design factors. For reducing the structural vibrations a control laws is presented that changes the properties of the electro-mechanical structure, like damping or stiffness. This is possible by a feedback of motion signals, e.g. velocity. The described electro-mechanical model was used for the control design. Experiment results, which are finally presented, show a reduction of structural vibrations.

: http://publica.fraunhofer.de/documents/N-70861.html