期刊
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
卷 20, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0960-1317/20/12/125009
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资金
- Research Council of Norway [191282, 181712/I30]
This paper presents the fabrication, characterization and modeling of a wideband MEMS electrostatic energy harvester utilizing nonlinear springs. The experimental results show that the vibration energy harvester displays a strong softening spring effect. For narrow band vibration, the energy harvester exhibits a widening bandwidth during frequency down-sweeps. For increasing levels of broadband random noise vibration, the energy harvester displays a broadening bandwidth response. Furthermore, the vibration energy harvester with softening springs not only increases the bandwidth, but also harvests more output power than a linear energy harvester at a sufficient level of broadband random vibration. At a broadband random vibration of 7.0 x 10(-4) g(2) Hz(-1), we found that the bandwidth increases by more than 13 times and the average harvesting output power increases by 68% compared to that of a linear vibration energy harvester. Numerical analysis confirmed that the softening springs are responsible for the band broadening.
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