Detail publikace

Designing, Modelling and Testing of Vibration Energy Harvester with Nonlinear Stiffness

RUBEŠ, O. HADAŠ, Z.

Originální název

Designing, Modelling and Testing of Vibration Energy Harvester with Nonlinear Stiffness

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

This paper is focused on a design of a piezoelectric vibration energy harvester with an additional nonlinear stiffness. Common piezoelectric energy harvesters consist of a cantilever with piezoceramic layers and a tip mass for tuning up the operation frequency. This system is excited by mechanical vibrations and it provides an autonomous source of electrical energy. A linear stiffness of the cantilever has very narrow resonance frequency bandwidth which makes the piezoelectric cantilever sensitive to tuning up of the resonance frequency. It could be tuned only for one narrow vibration frequency bandwidth. The piezoelectric vibration energy harvester with nonlinear stiffness could provide the resonance frequency bandwidth wider and it allows energy harvesting from the wider bandwidth of excitation vibrations. The additional nonlinear stiffness is implemented by using a set of permanent magnets. A simulation and an experiment were performed and the results show a wider resonance bandwidth. However, it depended on direction of vibration frequency sweeping. The frequency bandwidth is more than three times wider but there is only a half resonance amplitude of oscillations. That means that the maximal harvested power is lower but the average harvested power around resonance frequency was higher which was the goal of this research.

Klíčová slova

Nonlinear Stiffness, Vibrations, Energy Harvesting, Piezoelectricity, Resonance, Bandwidth, Bifurcation

Autoři

RUBEŠ, O.; HADAŠ, Z.

Vydáno

30. 5. 2017

Nakladatel

SPIE

Místo

Barcelona

ISBN

9781510609938

Kniha

Proceedings of SPIE - The International Society for Optical Engineering

Edice

10246

Číslo edice

1

ISSN

0277-786X

Periodikum

Proceedings of SPIE

Ročník

10246

Stát

Spojené státy americké

Strany od

102460W-1

Strany do

102460W-9

Strany počet

9

URL