Harvesting Variable-Speed Wind Energy with a Dynamic Multi-Stable Configuration
1
Department of Engineering Mechanics, Northwestern Polytechnical University, Xi’an 710072, China
2
School of Civil Engineering and Architecture, Henan University, Kaifeng 475004, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(6), 1389; https://doi.org/10.3390/ma13061389
Received: 26 February 2020
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Revised: 16 March 2020
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Accepted: 17 March 2020
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Published: 19 March 2020
(This article belongs to the Special Issue Smart Materials and Devices for Energy Harvesting)
To harvest the energy of variable-speed wind, we proposed a dynamic multi-stable configuration composed of a piezoelectric beam and a rectangular plate. At low wind speeds, the system exhibits bi-stability, whereas, at high wind speeds, the system exhibits a dynamic tri-stability, which is beneficial for harvesting variable-speed wind energy. The theoretical analysis was carried out. For validation, the prototype was fabricated, and a piezoelectric material was bonded to the beam. The corresponding experiment was conducted, with the wind speed increasing from 1.5 to 7.5 m/s. The experiment results prove that the proposed harvester could generate a large output over the speed range. The dynamic stability is helpful to maintain snap-through motion for variable-speed wind. In particular, the snap-through motion could reach coherence resonance in a range of wind speed. Thus, the system could keep large output in the environment of variable-speed wind.
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MDPI and ACS Style
Wang, Y.; Zhou, Z.; Liu, Q.; Qin, W.; Zhu, P. Harvesting Variable-Speed Wind Energy with a Dynamic Multi-Stable Configuration. Materials 2020, 13, 1389. https://doi.org/10.3390/ma13061389
AMA Style
Wang Y, Zhou Z, Liu Q, Qin W, Zhu P. Harvesting Variable-Speed Wind Energy with a Dynamic Multi-Stable Configuration. Materials. 2020; 13(6):1389. https://doi.org/10.3390/ma13061389
Chicago/Turabian StyleWang, Yuansheng, Zhiyong Zhou, Qi Liu, Weiyang Qin, and Pei Zhu. 2020. "Harvesting Variable-Speed Wind Energy with a Dynamic Multi-Stable Configuration" Materials 13, no. 6: 1389. https://doi.org/10.3390/ma13061389
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