About this Engineering article
A Novel Outer-inner Magnetic Two Degree-of-freedom Piezoelectric Energy Harvester by Libin Tian; Hui Shen; Qian Yang; Rujun Song; Yixiang Bian is a Engineering article available to read on EtoBox.
Aiming to achieve the high-performance piezoelectric energy harvester under broadband vibrations, an outer-inner magnetic two-degree-of-freedom piezoelectric energy harvester is proposed in this paper. An original linear two-degree-of-freedom energy harvester can achieve two close resonances both with large voltage amplitudes, using its cut-out cantilever beam. Based on the linear two-degree-of-freedom harvester, a nonlinear two-degree-of-freedom harvester has been developed by introducing two opposite magnets. The proposed harvester incorporates another two opposite magnets into the original nonlinear two-degree-of-freedom system, aiming to further broaden its operating bandwidth. A lumped-parameter model is established to describe the response characteristics of the proposed harvester with different magnet distances (D or d). Compared with the original nonlinear two-degree-of-freedom system, numerical and experimental results demonstrate that the proposed harvester can offer a significantly wider operating bandwidth in a lower frequency range. In the optimal configuration (D = 14 mm, d = 10 mm), the harvester can offer an operation bandwidth of 12.8 Hz (5–17.8 Hz) under 0.3 g exc
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- Author
- Libin Tian; Hui Shen; Qian Yang; Rujun Song; Yixiang Bian
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)