Performance of a cantilever piezoelectric energy harvester impacting a bump stop

Mak, Kuok H.; McWilliam, Stewart; Popov, Atanas A.; Fox, Colin

doi:10.1016/j.jsv.2011.07.008

Cited by 47 publications

(30 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The errors such as 2Hz frequency shift and 5V output voltage offset, could be attributed to the support conditions of the cantilevered harvester and the measuring system loss. 14,33 Fig . 5(b) shows the open circuit voltage and output power measured from the energy harvester with diverse resistive loads at resonant frequency.…”

Section: B Results and Discussionmentioning

confidence: 99%

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Liu

Wang

et al. 2015

AIP Advances

View full text Add to dashboard Cite

A utility piezoelectric energy harvester with low frequency and high-output voltage: Theoretical model, experimental verification and energy storage AIP Advances 6, 095208 (2016) As an alternative to traditional cantilever beam structures and their evolutions, a flexible beam based, interdigital structure, vibration energy harvester has been presented and investigated. The proposed interdigital-shaped oscillator consists of a rectangular flexible frame and series of cantilever beams interdigitally bonded to it. In order to achieve low frequency and wide-bandwidth harvesting, Young's modulus of materials, frame size and the amount of the cantilevers have been studied systematically. The measured frequency responses of the designed device (PDMS frame, quintuple piezoelectric cantilever beams) show a 460% increase in bandwidth below 80Hz. When excited at an acceleration of 1.0 g, the energy harvester achieves to a maximum open-circuit voltage of 65V, and the maximum output power 4.5 mW. C 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.

show abstract

Section: B Results and Discussionmentioning

confidence: 99%

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Liu

Wang

et al. 2015

AIP Advances

View full text Add to dashboard Cite

show abstract

“…The impact velocity of the two colliding bodies can be quantified by the restitution coefficient, which simplifies the modelling process. However, the coefficient of restitution has to be determined through experiments (Mak et al, 2011). Furthermore, the experiments conducted by Guigon et al (2008a), Vatansever et al (2011) and Alkhaddeim et al (2012) considered only single droplet test.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a piezoelectric beam subjected to water droplet impact with water layer formed on the surface

Wong

Yap

2014

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Rain impact energy harvesting using piezoelectric energy harvester has gained much attention recently. However, previous works have only considered the effect of single water droplet. In the case of raindrop, water would accumulate on the surface of the energy harvester and form a shallow water layer. This article models the dynamics of a piezoelectric beam, served as a raindrop energy harvester, subjected to water droplet impact with water layer formed on the surface. The impact of water droplet on the tip of the energy harvester is modelled as an impulsive force, and the water layer on the surface of the energy harvester is modelled as an added mass to the energy harvester. An attempt to model the force generated by the water ripple as a distributed load on the piezoelectric beam is presented. Numerical studies have been conducted based upon the proposed mathematical model verified by experimental results. The results showed that the presence of the water layer affects the output voltage and the dominant frequency of the energy harvester. It reveals that the effect of water (or rain) accumulation on the piezoelectric surface should be considered in deriving an optimal operating condition of such energy harvester.

show abstract

“…Furthermore,f or harvesting ample energy over aw ide band of frequencies, many researchers have introduced nonlinear generators whereby nonlinear stiffness effects are used to increase the operating range. [16][17][18][19][20][21][22][23] Then onlinear energy harvester can take the form of abistable oscillator with cubic nonlinear stiffness typically introduced by using magnets. Ferrarie tal.…”

Section: Introductionmentioning

confidence: 99%

Finite‐Element Analysis of a Varying‐Width Bistable Piezoelectric Energy Harvester

Kumar

Chauhan

et al. 2015

Energy Tech

View full text Add to dashboard Cite

In this study, a finite‐element analysis of a varying‐width piezoelectric energy harvester (PEH) has been presented. A varying‐width piezoelectric energy harvester (cantilever type) has variation in the width at definite intervals along its length. To harvest the energy over the wide frequency range of environmental vibrations, nonlinearity is introduced in the stiffness by mean of two neodymium magnets. The width of the proposed varying‐width cantilever PEH is calculated using block pulse functions (BPFs). The objective of applying BPFs is to proximate a triangular PEH (with fixed base) into a proposed varying‐width PEH with three rectangular sections along length. The use of BPFs enable the use of rectangular patches of lead zirconate titanate (PZT‐5A). This leads to a reduction in cost as machining PZT at other than straight cuts results in an extensive increase in the production costs. The varying‐width piezoelectric cantilever beam is subjected to harmonic base excitations by applying a vertical acceleration of 0.2 g (g=9.81 m s−2). Numerical study indicates that the bistable varying‐width PEH generates at least two times the average power than that generated by a bistable uniform‐width PEH for the same volume of piezoelectric material and for the same linear natural frequency. Furthermore, the bistable varying‐width PEH is optimized using a genetic algorithm technique to maximize the mean power density.

show abstract

Performance of a cantilever piezoelectric energy harvester impacting a bump stop

Cited by 47 publications

References 22 publications

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Low-frequency and wideband vibration energy harvester with flexible frame and interdigital structure

Dynamics of a piezoelectric beam subjected to water droplet impact with water layer formed on the surface

Finite‐Element Analysis of a Varying‐Width Bistable Piezoelectric Energy Harvester

Contact Info

Product

Resources

About