Vol. 5, No. 3, 2010

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ISSN: 1559-3959
Theoretical and experimental studies of beam bimorph piezoelectric power harvesters

Shudong Yu, Siyuan He and Wen Li

Vol. 5 (2010), No. 3, 427–445
Abstract

This paper presents a theoretical model for simulating a piezoelectric beam bimorph power harvester consisting of a laminated piezoelectric beam, a proof mass, and an electrical load. The vertical offset of the proof mass center from the beam centroid couples the bending and longitudinal motions, which makes it necessary to consider both longitudinal and lateral vibrations simultaneously. Experiments were carried out on a beam bimorph prototype mounted on a shaker to measure the electrical output. Numerical results obtained using the proposed procedure for piezoelectric bimorph power harvesters are in good agreement with the experimental data.

Keywords
power harvesting, finite element modeling, piezoelectric structures, bending, axial deformation, rotary inertia
Milestones
Received: 24 June 2009
Revised: 26 November 2009
Accepted: 26 November 2009
Published: 15 October 2010
Authors
Shudong Yu
Department of Mechanical and Industrial Engineering
Ryerson University
350 Victoria Street
Toronto M5B 2K3
Canada
Siyuan He
Department of Mechanical and Industrial Engineering
Ryerson University
350 Victoria Street
Toronto M5B 2K3
Canada
Wen Li
Department of Mechanical and Industrial Engineering
Ryerson University
350 Victoria Street
Toronto M5B 2K3
Canada