Nonlinear Energy Harvesting by Piezoelectric Bionic 'M' Shape Generating Beam Featured in Reducing Stress Concentration

Inspired by the flapping wings of seagulls during flight, a new low-cost, magnet-free, bistable piezoelectric energy harvester is proposed to obtain energy from low-frequency vibration and convert it into electrical energy and reduce fatigue damage caused by stress concentration. In order to optimiz...

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Bibliographic Details
Published in:Micromachines (Basel) 2023-05, Vol.14 (5), p.1007
Main Authors: Xiong, Chao, Wu, Nan, He, Yuncheng, Cai, Yuan, Zeng, Xianming, Jin, Peichen, Lai, Minyi
Format: Article
Language:English
Subjects:
Bandwidths
Bionics
bistable
Comparative analysis
Deformation
Design
Efficiency
Electric power production
Energy
energy barrier
Energy harvesting
Energy industry
Fatigue failure
Finite element method
Flapping wings
Gulls
low frequency
M-type
Open circuit voltage
Optimization
Piezoelectricity
Stress concentration
Vibration
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Summary:Inspired by the flapping wings of seagulls during flight, a new low-cost, magnet-free, bistable piezoelectric energy harvester is proposed to obtain energy from low-frequency vibration and convert it into electrical energy and reduce fatigue damage caused by stress concentration. In order to optimize the power generation efficiency of this energy harvesting, finite element analysis and experimental tests were carried out. The results of finite element analysis and experimental results are in good agreement, and the superior performance in improving stress concentration of the energy harvester compared to the previous parabolic (bow-shaped) one using bistable technology was quantitatively analyzed using finite element simulation, with a maximum stress reduction of 32.34%. The experimental results showed that under optimal operating conditions, the maximum open-circuit voltage of the harvester was 11.5 V, and the maximum output power was 73 μW. These results indicate that this is a promising strategy, which provides a reference for collecting vibrational energy in low-frequency environments.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14051007