Modeling and parametric study of a force-amplified compressive-mode piezoelectric energy harvester

Zhengbao Yang, Jean Zu, Jun Luo, Yan Peng

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Piezoelectric energy harvesters have great potential for achieving inexhaustible power supply for small-scale electronic devices. However, the insufficient power-generation capability and the narrow working bandwidth of traditional energy harvesters have significantly hindered their adoption. To address these issues, we propose a nonlinear compressive-mode piezoelectric energy harvester. We embedded a multi-stage force amplification mechanism into the energy harvester, which greatly improved its power-generation capability. In this article, we describe how we first established an analytical model to study the force amplification effect. A lumped-parameter model was then built to simulate the strong nonlinear responses of the proposed energy harvester. A prototype was fabricated which demonstrated a superior power output of 30 mW under an excitation of 0.3g (g = 9. 8 m/s2). We discuss at the end the effect of geometric parameters that are influential to the performance. The proposed energy harvester is suitable to be used in low-frequency weak-excitation environments for powering wireless sensors.

Original languageEnglish
Pages (from-to)357-366
Number of pages10
JournalJournal of Intelligent Material Systems and Structures
Volume28
Issue number3
DOIs
StatePublished - 1 Feb 2017

Keywords

  • Energy harvesting
  • amplification effect
  • flexural motion
  • nonlinear vibration
  • piezoelectric

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