
Proceedings Paper
Multiband damping of resonant vibrating piezoelastic structures by using digital adaptive passive shuntingFormat | Member Price | Non-Member Price |
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Paper Abstract
This contribution is concerned with passive vibration damping via a digital shunting device. This device is
capable to simulate arbitrary R-L input / output-phase behaviour and is able to adjust these parameters in real
time to fulfil the underlying structural demands. The virtual resonator is coupled with a capacitive piezoelectric
patch bonded on the vibrating structure. The software implementation of the R-L circuit offers the possibility
of adaptive adjustment and frequency tracking in case of eigenfrequency shifts on the vibrating structure that
can happen due to temperature and structural stress changes. The multi band damping is realized by increasing
the number of virtual R-L shunts connected in parallel. In order to separate the individual resonators and
decrease the mutual influence, an additional virtual capacitor for each R-L section is needed. The algorithms
are evaluated on a simple mathematical example equipped with a piezoelectric element. To demonstrate the
capabilities of the system tests were carried out on a steel plate and a mechanical harmonic oscillator. By
placing the patch on a common anti-node of different frequencies the digital shunting device is able to damp
selected eigenfrequencies. The effectiveness of the passive shunting device was demonstrated during tests, where
a reduction of the vibration level up to 15 dB was achieved.
Paper Details
Date Published: 28 March 2012
PDF: 10 pages
Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 834125 (28 March 2012); doi: 10.1117/12.915166
Published in SPIE Proceedings Vol. 8341:
Active and Passive Smart Structures and Integrated Systems 2012
Henry A. Sodano, Editor(s)
PDF: 10 pages
Proc. SPIE 8341, Active and Passive Smart Structures and Integrated Systems 2012, 834125 (28 March 2012); doi: 10.1117/12.915166
Show Author Affiliations
Helmut Wernick, PROFACTOR GmbH (Austria)
Johannes Korak, PROFACTOR GmbH (Austria)
Published in SPIE Proceedings Vol. 8341:
Active and Passive Smart Structures and Integrated Systems 2012
Henry A. Sodano, Editor(s)
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