Modeling and identification of electro-elastic nonlinearities in ultrasonic power transfer systems

Vamsi C. Meesala, Muhammad R. Hajj, Shima Shahab

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

We establish a nonlinear non-conservative mathematical framework for the acoustic-electro-elastic dynamics of the response of a piezoelectric disk to high-level acoustic excitation in the context of ultrasound acoustic energy transfer. Nonlinear parameter identification is performed to estimate the parameters representing nonlinear piezoelectric coefficients. The identification is based on exploiting the vibrational response of the disk operating in the thickness mode under dynamic actuation. The nonlinearly coupled electro-elastic governing equations, for the piezoelectric receiver subjected to acoustic excitation, are derived using the generalized Hamilton’s principle. The method of multiple scales is used to obtain an approximate solution that forms the basis for parameter identification. The identified coefficients are then experimentally validated. The effects of varying these coefficients on the nonlinear response, optimal resistive electrical loading, and power generation characteristics of the receiver are investigated.

Original languageEnglish
Pages (from-to)249-268
Number of pages20
JournalNonlinear Dynamics
Volume99
Issue number1
DOIs
StatePublished - 1 Jan 2020

Keywords

  • Contactless power transfer
  • Material nonlinearity
  • Method of multiple scales
  • Optimal resistive electrical loading
  • Piezoelectric materials
  • Ultrasound acoustic energy transfer

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