The effects of width reduction on the damping of a cantilever beam and its application in increasing the harvesting power of piezoelectric energy harvester

Jedol Dayou, and Jaehwan Kim, and Jongbeom Im, and Lindong Zhai, and Liew, Willey ,Yun Hsien and Ting , Aaron,Chuan How (2015) The effects of width reduction on the damping of a cantilever beam and its application in increasing the harvesting power of piezoelectric energy harvester. Smart Materials and Structures, 24 (4). ISSN 0964-1726

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Official URL: http://dx.doi.org/10.1088/0964-1726/24/4/045006

Abstract

Previous work shows that when a cantilever piezoelectric energy harvester with a given width is split into several pieces and then electrically connected in parallel, the output power increases substantially compared with when it acts in a single piece with a similar total width. It was hypothesized that this increase is due to the reduction in the damping of the width-reduced beam. As a result, the beam with the smaller width vibrates with higher amplitudes and therefore has higher energy harvesting capability. In this paper, this hypothesis is examined by measuring the damping of the cantilever beam as its width is reduced. It is shown that as the width decreases, the damping is reduced, which contributes to the increase in the harvested power. It is then shown that the harvested energy from an array of cantilever piezobeams with a certain total width is higher than that from a single-piece harvester of similar width. © 2015 IOP Publishing Ltd.

Item Type:Article
Uncontrolled Keywords:ambient vibration; energy conversion; MEMS; piezoelectric energy harvester; structural damping; width-splitting method
Subjects:T Technology > TA Engineering (General). Civil engineering (General)
ID Code:10817
Deposited By:IR Admin
Deposited On:23 Apr 2015 14:33
Last Modified:23 Apr 2015 14:33

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