Imperial College London
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ProfessorHailingFu

Faculty of Engineering, Department of Aeronautics

Visiting Researcher
 
 
 
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Contact

 

h.fu14 Website CV

 
 
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Location

 

420City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Fu:2019:10.1063/1.5092593,
author = {Fu, H and Sharif, Khodaei Z and Aliabadi, M},
doi = {10.1063/1.5092593},
journal = {Applied Physics Letters},
title = {A bio-inspired host-parasite structure for broadband vibration energy harvesting from low-frequency random sources},
url = {http://dx.doi.org/10.1063/1.5092593},
volume = {114},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Energy harvesting for low-power sensing has drawn great attention, but still faces challenges in harnessing broadband random motions. Inspired by the parasitic relationship in plants, a host-parasite vibration harvester is designed to scavenge random low-frequency vibrations by incorporating bi-stability and frequency up-conversion within such a design. A hosting beam is formed in a buckled condition by clamping it at both ends and applying an axial compression load. Two parasitic piezoelectric beams are fixed at the center of the hosting beam and plucked at the free ends by two plectra on the hosting beam, while it oscillates in an inter-well mode. The low-frequency hosting beam oscillation is converted to high-frequency parasitic beam's vibration at resonance due to the plucking effect, allowing the harvester to convert the broadband low-frequency motion into electricity effectively. The electromechanical dynamics are modeled and the design is validated experimentally. The harvester is capable of harnessing low-frequency random vibration (0.0018 g2/Hz @ 5–400 Hz) over a wide bandwidth. More than 1 mJ energy was collected over 100 s under this pseudorandom vibration.Energy harvesting has been recognized as one of the key enablers for self-powered sensing applications in the era of Internet of things.1–4 However, enhancing the energy harvesting effectiveness requires significant efforts, especially for different energy sources under various conditions, such as low-frequency human motion,5,6 random aircraft vibrations7 or ocean waves.8 Harnessing a random, broadband and low-frequency kinetic energy is one of the key challenges, and different mechanisms have been developed to enhance the conversion performance.Nonlinear dynamics are one major consideration to enhance the operation bandwidth.9–11 Different harvesters have been developed with monostable,12–14 bistable15–17 and multistable behaviors.18–20 The aim is to al
AU  - Fu,H
AU  - Sharif,Khodaei Z
AU  - Aliabadi,M
DO  - 10.1063/1.5092593
PY  - 2019///
SN  - 0003-6951
TI  - A bio-inspired host-parasite structure for broadband vibration energy harvesting from low-frequency random sources
T2  - Applied Physics Letters
UR  - http://dx.doi.org/10.1063/1.5092593
UR  - http://hdl.handle.net/10044/1/69129
VL  - 114
ER  -
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