Accurate calibration of RL shunts for piezoelectric vibration damping of flexible structures

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Abstract

Piezoelectric RL (resistive-inductive) shunts are passive resonant devices used for damping of dominantvibration modes of a flexible structure and their efficiency relies on precise calibration of the shuntcomponents. In the present paper improved calibration accuracy is attained by an extension of the localpiezoelectric transducer displacement by two additional terms, representing the flexibility and inertiacontributions from the residual vibration modes, not explicitly targeted by the shunt damping. This resultsin an augmented dynamic model for the targeted resonant vibration mode, in which the residualcontributions, represented by two correction factors, modify both the apparent transducer capacitanceand the shunt impedance. Explicit expressions for the correction of the shunt circuit inductance and resistanceare presented in a form that is generally applicable to calibration formulae derived on the basisof an assumed single-mode structure, in which the modal interaction has been deliberately neglected.A design procedure is devised and subsequently verified by numerical examples, demonstrating that effectivemitigation can be obtained for an arbitrary vibration mode when the residual mode correction isincluded in the calibration of the RL shunt.
Original languageEnglish
Title of host publicationProceedings of the 27th International Conference on Adaptive Structures and Technologies (ICAST 2016)
Number of pages11
Publication date2016
Publication statusPublished - 2016
Event27th International Conference on Adaptive Structures and Technologies (ICAST 2016) - The Sagamore Resort, Lake George, NY, United States
Duration: 3 Oct 20165 Oct 2016

Conference

Conference27th International Conference on Adaptive Structures and Technologies (ICAST 2016)
Location The Sagamore Resort
CountryUnited States
CityLake George, NY
Period03/10/201605/10/2016

Cite this

Høgsberg, J. B., & Krenk, S. (2016). Accurate calibration of RL shunts for piezoelectric vibration damping of flexible structures. In Proceedings of the 27th International Conference on Adaptive Structures and Technologies (ICAST 2016)