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Applied energy v.212, 2018년, pp.233 - 243   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

An impact-based broadband aeroelastic energy harvester for concurrent wind and base vibration energy harvesting

Zhao, Liya (School of Mechanical and Mechatronic Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, 15 Broadway, Ultimo 2007, NSW, Australia ) ; Yang, Yaowen (School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore ) ;
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    Abstract This paper proposes a novel broadband energy harvester to concurrently harvest energy from base vibrations and wind flows by utilizing a mechanical stopper. A problem for a conventional wind energy harvester is that it can only effectively harness energy from two types of excitations around its resonance frequency. The proposed design consists of a D-shape-sectioned bluff body attached to a piezoelectric cantilever, and a mechanical stopper fixed at the bottom of the cantilever which introduces piecewise linearity through its impact with the bluff body. The quasi-periodic oscillations are converted to periodic vibration due to the introduction of the mechanical stopper, which forces the two excitation frequencies to lock into each other. Broadened bandwidth for effective concurrent energy harvesting is thus achieved, and at the same time, the beam deflection is slightly mitigated and fully utilized for power conversion. The experiment shows that with the stopper-bluff body distance of 19.5 mm, the output power from the proposed harvesting device increases steadily from 3.0 mW at 17.3 Hz to 3.8 mW at 19.1 Hz at a wind speed of 5.5 m/s and a base acceleration of 0.5 g. A guideline for the stopper configuration is also provided for performance enhancement of the broadband concurrent wind and vibration energy harvester. Highlights A novel impact-based broadband aeroelastic energy harvester is proposed. Broadened bandwidth for concurrent wind and vibration energy harvesting is achieved. Quasi-periodic vibration is converted to periodic vibration. An aero-electro-mechanically coupled model is experimentally validated. Peak beam deflection is slightly mitigated and fully utilized for power conversion.


  • 주제어

    Broadband concurrent energy harvesting .   Wind energy .   Vibration .   Piezoelectric .   Mechanical stopper .   Piecewise-linearity.  

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