Influence of contact point location on dynamical and electrical responses of impact‐type vibration energy harvester based on piezoelectric transduction

Milasauskaite, Ieva; Daukševičius, Rolanas; Ostaševičius, Vytautas; Gaidys, Rimvydas; Janušas, Giedrius

doi:10.1002/zamm.201300246

Cited by 3 publications

(2 citation statements)

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“…The researchers in [ 11 ] aim to propose inexhaustible energy harvesters efficient enough to power wireless sensor nodes (the power ranges of which may reach hundreds of microwatts in active operation modes), which would address what is currently the most expensive issue of WSN node maintenance, i.e ., battery replacement. The latter issue becomes more prominent with increasing numbers of wireless devices causing environmental hazards due to battery chemical waste.…”

Section: Introductionmentioning

confidence: 99%

“…The results presented in this paper fall into the group of research on optimal structural design of harvesters as it concerns a structural modification of harvester design via electrode segmentation of a piezoelectric vibrating energy harvester (PVEH) in order to boost its output voltage. The paper combines the authors’ knowledge on coupled-field nonlinear contact-type piezoelectric transducer modelling and simulation [ 14 ], experimental studies of coupled dynamic and electric aspects of the PVEH under variable resistive load [ 11 ] as well as hybrid numerical-experimental optical techniques, which are applied for the characterization of nonlinearity in micro-cantilevers [ 15 ], presented in previous papers. Moreover, the research covers some aspects of classical vibration theory which suggests that higher vibration modes of the cantilever beam have strain nodes, where the dynamic strain distribution changes sign.…”

Section: Introductionmentioning

confidence: 99%

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Peculiarities of the Third Natural Frequency Vibrations of a Cantilever for the Improvement of Energy Harvesting

Ostaševičius

Janušas

Milasauskaite

et al. 2015

Sensors

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This paper focuses on several aspects extending the dynamical efficiency of a cantilever beam vibrating in the third mode. A few ways of producing this mode stimulation, namely vibro-impact or forced excitation, as well as its application for energy harvesting devices are proposed. The paper presents numerical and experimental analyses of novel structural dynamics effects along with an optimal configuration of the cantilever beam. The peculiarities of a cantilever beam vibrating in the third mode are related to the significant increase of the level of deformations capable of extracting significant additional amounts of energy compared to the conventional harvester vibrating in the first mode. Two types of a piezoelectric vibrating energy harvester (PVEH) prototype are analysed in this paper: the first one without electrode segmentation, while the second is segmented using electrode segmentation at the strain nodes of the third vibration mode to achieve effective operation at the third resonant frequency. The results of this research revealed that the voltage generated by any segment of the segmented PVEH prototype excited at the third resonant frequency demonstrated a 3.4–4.8-fold increase in comparison with the non-segmented prototype. Simultaneously, the efficiency of the energy harvester prototype also increased at lower resonant frequencies from 16% to 90%. The insights presented in the paper may serve for the development and fabrication of advanced piezoelectric energy harvesters which would be able to generate a considerably increased amount of electrical energy independently of the frequency of kinematical excitation.

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Section: Introductionmentioning

confidence: 99%