Piezoelectric RL shunt damping of flexible structures

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Abstract

Resonant RL shunt circuits represent a robust and effective approach to piezoelectric damping, provided that the individual shunt circuit components are calibrated accurately with respect to the dynamic properties of the corresponding flexible structure. The balanced calibration procedure applied in the present analysis is based on equal damping of the two modes associated with the resonant vibration form of the structure. An important result of the presented calibration procedure is the explicit inclusion of a quasi-static contribution from the non-resonant vibration modes of the structure via a single background flexibility parameter. This leads to explicit calibration expressions for the shunt circuit components and it is demonstrated by a simple numerical example that the procedure with correction for background flexibility leads to both equal damping of the two modes and effective response reduction.
Original languageEnglish
Title of host publicationProceedings of 7th ECCOMAS Thematic Conference on Smart Structures and Materials
EditorsA.L. Araúo, C.A. Mota Soares
Number of pages15
PublisherIDMEC
Publication date2015
Publication statusPublished - 2015
EventThe ECCOMAS Thematic Conference on Smart Structures and Materials - University of the Azores , Ponta Delgada, Portugal
Duration: 3 Jun 20156 Jun 2015
http://www.dem.ist.utl.pt/smart2015/

Conference

ConferenceThe ECCOMAS Thematic Conference on Smart Structures and Materials
Location University of the Azores
CountryPortugal
CityPonta Delgada
Period03/06/201506/06/2015
Internet address

Keywords

  • RL shunts
  • Piezoelectric damping
  • Structural dynamics
  • Resonant calibration

Cite this

Høgsberg, J. B., & Krenk, S. (2015). Piezoelectric RL shunt damping of flexible structures. In A. L. Araúo, & C. A. Mota Soares (Eds.), Proceedings of 7th ECCOMAS Thematic Conference on Smart Structures and Materials IDMEC.