Two Dimensional Bistable Vibration Energy Harvester

Andò, B.; Baglio, Salvatore; Maiorca, F.; Trigona, Carlo

doi:10.1016/j.proeng.2012.09.333

Cited by 23 publications

(13 citation statements)

References 9 publications

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“…Hence, the obtainable power is calculated assuming that the second sensitive axis is offset by a rotation of 90 degrees on the plane, as shown by (15). The relative power obtainable from the 2-DOF microgenerator, , is the sum of powers available from each of the projected accelerations and .…”

Section: B the Effect Of Rotation In 2-dof Microgeneratorsmentioning

confidence: 99%

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Modeling the Effect of Orientation on Human-Powered Inertial Energy Harvesters

2015

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Abstract-A fundamental challenge in realizing body-worn sensors is in providing an effective and long-lasting power supply. Issues regarding batteries have prompted researchers to investigate powering devices by extracting energy from the inertial movement of the human body. While previous studies have investigated the effect of generator location and wearer activity on harvestable power, they have not considered the orientation of the generator; this is the focus of this paper. Acceleration data collected across a sample population (ten participants) during different activities (walking and running) and generator location (five locations on the body) are presented.These data are processed to analyze the effect of orientation, and we find that it can significantly reduce the harvestable power.Subsequently, we propose and analyze how two degree-offreedom generators can improve tolerance to rotation; results indicate that it can be improved by one order of magnitude.

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Section: B the Effect Of Rotation In 2-dof Microgeneratorsmentioning

confidence: 99%

“…More recently, designs have been proposed for generators that are able to harvest energy from more than one axis. Techniques using two degree-of-freedom (2-DOF) microgenerators (those that do not have a single axis of excitation, but instead can harvest energy from motion in a plane) have demonstrated increased energy generation [13], [14], [15].…”

mentioning

confidence: 99%

Modeling the Effect of Orientation on Human-Powered Inertial Energy Harvesters

2015

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“…Recently, this issue has drawn the attention of several researchers. Andò et al [19] presented a two-dimensional nonlinear PEH that is realized by establishing the magnetic coupling between two piezoelectric cantilever beams. The two beams are arranged in a line but deflect along two orthogonal directions.…”

Section: Introductionmentioning

confidence: 99%

Design and development of a multipurpose piezoelectric energy harvester

Fan

Chang

Chao

et al. 2015

Energy Conversion and Management

122

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“…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%

“…[a] T. Kumar ing conditions.O ns imilar grounds,A ndo et al [22] proposed an onlinear bistable oscillatorb ased on two-dimensional, magnetically-coupled,P ZT-based beams able to extract energy from ambientv ibrations at arbitrary directions.T he above findings are established on the assumption that the system is a" single degree of freedom"( SDOF)s ystem, which was followed by experimental validation.T hereforet o harvest the energy over the wide range of environmental frequencies, bistability is inductedi nto the system by means of ar epulsive magnetic force.I nt his study to increaset he generated power and to harvest the energy over wide rangeo f environmental vibration frequenciess imultaneously,abistable varying-width PEH is analyzed using the finite-element method. Theh arvested energy from ab istable varying-width PEH has been compared to the harvested energy from bistable uniform-width PEH.…”

Section: Introductionmentioning

confidence: 99%

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

Kumar

Chauhan

et al. 2015

Energy Tech

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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.

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Two Dimensional Bistable Vibration Energy Harvester

Cited by 23 publications

References 9 publications

Modeling the Effect of Orientation on Human-Powered Inertial Energy Harvesters

Modeling the Effect of Orientation on Human-Powered Inertial Energy Harvesters

Design and development of a multipurpose piezoelectric energy harvester

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

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