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10 May 2024 Piezoelectric annular stable broadband vibration energy harvesting
Jiawen Xu
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Proceedings Volume 12946, Active and Passive Smart Structures and Integrated Systems XVIII; 1294611 (2024) https://doi.org/10.1117/12.3010065
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States
Abstract
Conventional bi-stable piezoelectric cantilever-based vibration energy harvesters must jump over the potential barrier for the large amplitude oscillation. In this research, we develop a harvester with annular potential energy function. The harvester can circumambulate around the potential barrier rather than jumping over it over a wide spectrum under small amplitude excitations. The proposed harvester contains two conventional piezoelectric cantilevers placed orthogonal to each other which are coupled by repulsive magnetic force. We demonstrate the features of the proposed harvester analytically and experimentally. Case studies were carried out, and it is proved that the proposed annular stable harvester has a bandwidth of 3.9 Hz and a voltage output performance 3.01 times better than that of a conventional bistable one under excitations of 3 m/s2.
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Jiawen Xu "Piezoelectric annular stable broadband vibration energy harvesting", Proc. SPIE 12946, Active and Passive Smart Structures and Integrated Systems XVIII, 1294611 (10 May 2024); https://doi.org/10.1117/12.3010065
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KEYWORDS
Vibration
Energy harvesting
Bistability
Magnetism
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