Published: 30 June 2012

Bond graph-based analysis of energy conversion in vibration-piezoelectricity coupling and its application to a cantilever vibra tion energy harvester

Chuan Li1
Daewoong Hong2
Kwang-Ho Kwon3
Jaehwa Jeong4
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Abstract

The energy flow in a piezoelectric vibration energy harvester (VEH) involves both the mechanical domain and the electrical domain. To better understand the vibration-piezoelectricity coupling of this device, a unified description approach based on the bond graph is proposed to analyze the influence of the piezoelectric VEH parameters on the electricity harvesting performance in the energy conversion. Both the mechanical structure and the electric circuit are modeled using the bond graph. The present method is applied to analyze the parametric configuration of a piezoelectric VEH, which is further tested on an experimental platform. The results show that the unified model using the bond-graph is well-suited for analyzing the vibration-piezoelectricity coupling. The proposed method can advance the design optimization of piezoelectric VEHs.

About this article

Received
07 February 2012
Accepted
14 May 2012
Published
30 June 2012
Keywords
vibration energy harvesting
bond graph
coupling
cantilever
piezoelectricity