期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 21, 期 13, 页码 1337-1341出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X09355662
关键词
energy harvesting; piezoelectric cantilever; pink noise; magnetic coupling
资金
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0906961] Funding Source: National Science Foundation
It is demonstrated experimentally that the energy harvested from a random noise source by a piezoelectric cantilever can be substantially enhanced by introducing a magnetic coupling force. The coupled cantilever responds to a 1/f vibration spectrum ('pink noise') with chaotic motion that on average has larger amplitude than the non-chaotic motion of an uncoupled cantilever. A 50% increase in output voltage was observed in the coupled cantilever compared to the uncoupled cantilever. Calculations show that the magnetic force transforms the quadratic spring potential of the cantilever into a double valley of two potential wells. Fluctuations between the two potential minima increase the amplitude of the cantilever motion over a range of vibration frequencies.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据