Multi-resonant wideband energy harvester based on a folded asymmetric M-shaped cantilever

This article reports a compact wideband piezoelectric vibration energy harvester consisting of three proof masses and an asymmetric M-shaped cantilever. The M-shaped beam comprises a main beam and two folded and dimension varied auxiliary beams interconnected through the proof mass at the end of the...

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Bibliographic Details
Published inAIP advances Vol. 5; no. 7; pp. 077149 - 077149-7
Main Authors Wu, Meng, Ou, Yi, Mao, Haiyang, Li, Zhigang, Liu, Ruiwen, Ming, Anjie, Ou, Wen
Format Journal Article
LanguageEnglish
Published United States AIP Publishing LLC 01.07.2015
Subjects
ASYMMETRY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPACTS
COMPUTERIZED SIMULATION
DEGREES OF FREEDOM
ELECTRIC POTENTIAL
ELECTRIC UTILITIES
FINITE ELEMENT METHOD
MASS
MECHANICAL VIBRATIONS
OPERATION
PIEZOELECTRICITY
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Summary:This article reports a compact wideband piezoelectric vibration energy harvester consisting of three proof masses and an asymmetric M-shaped cantilever. The M-shaped beam comprises a main beam and two folded and dimension varied auxiliary beams interconnected through the proof mass at the end of the main cantilever. Such an arrangement constitutes a three degree-of-freedom vibrating body, which can tune the resonant frequencies of its first three orders close enough to obtain a utility wide bandwidth. The finite element simulation results and the experimental results are well matched. The operation bandwidth comprises three adjacent voltage peaks on account of the frequency interval shortening mechanism. The result shows that the proposed piezoelectric energy harvester could be efficient and adaptive in practical vibration circumstance based on multiple resonant modes.
ISSN:2158-3226
2158-3226
DOI:10.1063/1.4927466