Circuit analog of a beam and its application to multimodal vibration damping, using piezoelectric transducers

M. Porfiri, F. Dell'Isola, F. M.Frattale Mascioli

Research output: Contribution to journalArticle


In this paper we solve the synthesis problem of finding a completely passive electric circuit analog to a vibrating beam. The synthesis problem is of interest when one wants to suppress beam mechanical vibrations by using distributed piezoelectric transduction. Indeed, an effective electromechanical energy transduction is guaranteed when the electric circuit (interconnecting the transducers' terminals) is resonant at all mechanical resonance frequencies and is able to mimic all the mechanical modal shapes. The designed electric circuit behaves as an electric controller of mechanical vibrations (i.e. an electric vibration damper) once suitably endowed with a set of resistors. Because of its completely passive nature, it does not require external power units and stands as an economical means of controlling vibrations.

Original languageEnglish (US)
Pages (from-to)167-198
Number of pages32
JournalInternational Journal of Circuit Theory and Applications
Issue number4
StatePublished - Jul 1 2004



  • Distributed control
  • Electric analogs
  • Multimodal vibrations
  • Multiport synthesis
  • Passive damping
  • Passive electric networks
  • Piezoelectric transducers
  • Smart structures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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