Table of Contents
Smart Materials Research
Volume 2013 (2013), Article ID 736487, 6 pages
http://dx.doi.org/10.1155/2013/736487
Research Article

Energy Harvesting Using an Analog Circuit under Multimodal Vibration

1Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency (JAXA), 3-1-1 Yoshinodai, Chuo Ward, Sagamihara, Kanagawa 252-5210, Japan
2Department of Aerospace Engineering, Tohoku University, 6-6-01 Aoba, Aramaki, Aoba Ward, Sendai, Miyagi 980-8579, Japan

Received 7 October 2012; Accepted 26 December 2012

Academic Editor: Xiaoning Jiang

Copyright © 2013 Shigeru Shimose et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The efficiency of harvesting energy from a vibrating structure using a piezoelectric transducer and a simple analog circuit is investigated experimentally. This analog circuit was originally invented for a synchronized switch damping on inductor (SSDI) technique, which enhances the damping of mechanical vibration. In this study, the circuit is used to implement a synchronized switch harvesting on inductor (SSHI) technique. A multiple degree of freedom (MDOF) structure is excited by single sinusoidal forces at its resonant frequencies and by random forces. The piezoelectric transducer converts this mechanical energy into electrical energy which is harvested using a standard rectifier bridge circuit with and without our analog circuit. Experimental results show that our analog circuit makes it possible to harvest twice as much energy under both single sinusoidal and random vibration excitations.