Modelling and optimisation of a bimorph piezoelectric cantilever beam in an energy harvesting application

Chung Ket Thein, Beng Lee Ooi, Jing Sheng Liu, James M. Gilbert

Research output: Journal PublicationArticlepeer-review

27 Citations (Scopus)

Abstract

Piezoelectric materials are excellent transducers in converting vibrational energy into electrical energy, and vibration-based piezoelectric generators are seen as an enabling technology for wireless sensor networks, especially in selfpowered devices. This paper proposes an alternative method for predicting the power output of a bimorph cantilever beam using a finite element method for both static and dynamic frequency analyses. Experiments are performed to validate the model and the simulation results. In addition, a novel approach is presented for optimising the structure of the bimorph cantilever beam, by which the power output is maximised and the structural volume is minimised simultaneously. Finally, the results of the optimised design are presented and compared with other designs.

Original languageEnglish
Pages (from-to)212-227
Number of pages16
JournalJournal of Engineering Science and Technology
Volume11
Issue number2
Publication statusPublished - Feb 2016
Externally publishedYes

Keywords

  • Bimorph cantilever beam
  • Energy harvesting
  • Multi-disciplinary optimisation
  • Piezoelectric
  • Shape optimisation

ASJC Scopus subject areas

  • Engineering (all)

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