Calibration of multiple shunted piezoelectric transducers with correction for residual modes and shunt interactions

Jens D. Richardt*, Boris Lossouarn, Jan Høgsberg, Jean-François Deü

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Piezoelectric shunt damping can be used for efficient vibration mitigation of a single or multiple vibration modes of a structure. Several analytical tuning expressions have been derived for numerous circuit topologies for a single shunt. However, when multiple shunted piezoelectric transducers are attached to a flexible structure, their individual interactions alongside the spill-over from residual modes affect the calibration accuracy. In this paper, explicit correction terms that represent these effects are presented for multiple shunted piezoelectric transducers targeting a single vibration mode. The correction terms are obtained from the evaluation of effective electromechanical coupling factors, while proper balancing between shunts follows from an assumed proportionality between shunt forces. The proposed correction method is applicable to general shunt architectures, for which tuning is available when targeting a single-degree-of-freedom structure. Its ability to regain nearby optimal damping properties is illustrated numerically for the classic series RL shunt.
Original languageEnglish
JournalJournal of Vibration and Control
ISSN1077-5463
DOIs
Publication statusAccepted/In press - 2024

Keywords

  • Piezoelectric shunt damping
  • Resonant shunt calibration
  • Residual mode correction
  • Effective electromechanical coupling factor
  • Vibration control

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