Publication Date:
2013-02-23
Description:
Vibration-based piezoelectric energy harvesters usually work at their resonant frequencies. The resonant frequencies can match, at most, one or two ambient exciting frequencies. In order to freely design multiple operating frequencies to match the given exciting frequencies, several oscillators were attached on a piezoelectric cantilever in this paper, which is named as a multi-mode piezoelectric energy harvester (MPEHer). A distributed-parameter model of the MPEHer was established to predict its output power, and then a lumped-parameter model was derived to determine its operating frequencies. With the lumped-parameter model, the oscillator parameters can be searched for given exciting frequencies. Considering the volume and weight limitation in engineering application, optimizing procedures for the MPEHer were further proposed. Following these procedures, an MPEHer limited by the oscillator-to-cantilever mass ratio of 2.7 was designed for two given exciting frequencies. Experiments show that, under the same input excitation, the average output power of the designed MPEHer is increased by 82% compared with that of a classical configuration, i.e. a piezoelectric cantilever with a tip mass. Content Type Journal Article Pages - DOI 10.3233/JAE-121620 Authors Haili Liu, Institute of Intelligent Mechatronics Research, Department of Instrument Science and Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China Tianzhu Xu, Institute of Intelligent Mechatronics Research, Department of Instrument Science and Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China Zhenyu Huang, Institute of Intelligent Mechatronics Research, Department of Instrument Science and Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China Dayue Chen, Institute of Intelligent Mechatronics Research, Department of Instrument Science and Engineering, School of Electronic, Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China Journal International Journal of Applied Electromagnetics and Mechanics Online ISSN 1875-8800 Print ISSN 1383-5416
Print ISSN:
1383-5416
Electronic ISSN:
1875-8800
Topics:
Electrical Engineering, Measurement and Control Technology
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Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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