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Increasing the performance of negative capacitance shunts by enlarging the output voltage to the requirements of piezoelectric transducers

Pohl, Martin (2016) Increasing the performance of negative capacitance shunts by enlarging the output voltage to the requirements of piezoelectric transducers. Journal of Intelligent Material Systems and Structures. SAGE Publications. ISSN 1045-389X

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Abstract

Piezoelectric shunt damping is investigated as one possible solution for improving the vibroacoustic behavior of noise-prone lightweight structures. The negative capacitance shunt circuit appears to be best choice due to its broadband damping effect. Usually it is built from analog electronic components, such as operational amplifiers, resistors and capacitors. Laboratory tests are possible with this setup, but it is limited to low vibrational excitation levels, because the known circuits are not capable of accessing a sufficient voltage amplitude at the piezoelectric transducers, which is required for high vibration amplitudes. Therefore an improved approach is presented in this paper, which addresses the specific voltage requirements of a common piezoelectric transducer. It comprises a tailored power source and an appropriate concept for the negative capacitance shunt hardware. There only standard operational amplifiers together with an external high voltage power amplifier circuit are used to cover the whole operating range of a piezoelectric transducer. A demonstrator board is developed and experimentally investigated at a test structure. Finally, the results are compared to a conventional setup. It can be shown, that using the full voltage range of the piezoelectric transducer allows higher damping of structures without any saturation effects.

Item URL in elib:https://elib.dlr.de/104512/
Document Type:Article
Title:Increasing the performance of negative capacitance shunts by enlarging the output voltage to the requirements of piezoelectric transducers
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pohl, MartinMartin.Pohl (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:Journal of Intelligent Material Systems and Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Publisher:SAGE Publications
ISSN:1045-389X
Status:Published
Keywords:piezoelectric shunt damping, negative capacitance, vibration damping, high voltage
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Pohl, Martin
Deposited On:06 Jun 2016 07:31
Last Modified:10 Jan 2019 15:48

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