Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting
This paper describes a piezoelectric energy harvester employing a snap-through buckling (STB) mechanism for frequency-up conversion (FuC). The harvester consists of two main components: a bistable mechanical structure and one piezoelectric cantilever beam. The device is designed by means of analytic...
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doaj-8abe71da87a148fdab3dae08b69702ef2020-11-25T03:27:11ZengMDPI AGApplied Sciences2076-34172020-05-01103614361410.3390/app10103614Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy HarvestingAlessandro Speciale0Raffaele Ardito1Marco Baù2Marco Ferrari3Vittorio Ferrari4Attilio A. Frangi5Department of Civil and Environmental Engineering DICA, Politecnico di Milano, Piazza Leonardo Da Vinci, 32, 20133 Milan (MI), ItalyDepartment of Civil and Environmental Engineering DICA, Politecnico di Milano, Piazza Leonardo Da Vinci, 32, 20133 Milan (MI), ItalyDepartment of Information Engineering, University of Brescia, via Branze 38, 25123 Brescia (BS), ItalyDepartment of Information Engineering, University of Brescia, via Branze 38, 25123 Brescia (BS), ItalyDepartment of Information Engineering, University of Brescia, via Branze 38, 25123 Brescia (BS), ItalyDepartment of Civil and Environmental Engineering DICA, Politecnico di Milano, Piazza Leonardo Da Vinci, 32, 20133 Milan (MI), ItalyThis paper describes a piezoelectric energy harvester employing a snap-through buckling (STB) mechanism for frequency-up conversion (FuC). The harvester consists of two main components: a bistable mechanical structure and one piezoelectric cantilever beam. The device is designed by means of analytical methods and numerical simulations. A proof-of-concept prototype is manufactured and tested under low frequency mechanical excitation. Experimental results show that, if the STB is induced, from the second stable configuration back to the undeformed one, the FuC is obtained and the response of the beam presents frequency components in a wide range, even though the resonant frequency of the cantilever beam is not excited. The results are hence in agreement with the expected behavior: if the device, forced in the second stable configuration, is subject to a low-frequency excitation whose amplitude exceeds a threshold, STB is triggered and the ensuing FuC provokes a widening of the beam vibrations frequency range and consequently a significant effectiveness in terms of power output. A maximum power of 4 mW is obtained by using an optimal resistive load as STB from a stable configuration of the bistable mechanism to the other one is triggered; a maximum energy of <inline-formula> <math display="inline"> <semantics> <mrow> <mn>4</mn> <mo>.</mo> <mn>5</mn> </mrow> </semantics> </math> </inline-formula><inline-formula> <math display="inline"> <semantics> <mi mathvariant="normal">J</mi> </semantics> </math> </inline-formula> is obtained in case of a rectifier circuit with storage capacitor.https://www.mdpi.com/2076-3417/10/10/3614piezoelectric convertersenergy harvestingsnap-through bucklingfrequency-up conversion |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alessandro Speciale Raffaele Ardito Marco Baù Marco Ferrari Vittorio Ferrari Attilio A. Frangi |
spellingShingle |
Alessandro Speciale Raffaele Ardito Marco Baù Marco Ferrari Vittorio Ferrari Attilio A. Frangi Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting Applied Sciences piezoelectric converters energy harvesting snap-through buckling frequency-up conversion |
author_facet |
Alessandro Speciale Raffaele Ardito Marco Baù Marco Ferrari Vittorio Ferrari Attilio A. Frangi |
author_sort |
Alessandro Speciale |
title |
Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting |
title_short |
Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting |
title_full |
Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting |
title_fullStr |
Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting |
title_full_unstemmed |
Snap-Through Buckling Mechanism for Frequency-up Conversion in Piezoelectric Energy Harvesting |
title_sort |
snap-through buckling mechanism for frequency-up conversion in piezoelectric energy harvesting |
publisher |
MDPI AG |
series |
Applied Sciences |
issn |
2076-3417 |
publishDate |
2020-05-01 |
description |
This paper describes a piezoelectric energy harvester employing a snap-through buckling (STB) mechanism for frequency-up conversion (FuC). The harvester consists of two main components: a bistable mechanical structure and one piezoelectric cantilever beam. The device is designed by means of analytical methods and numerical simulations. A proof-of-concept prototype is manufactured and tested under low frequency mechanical excitation. Experimental results show that, if the STB is induced, from the second stable configuration back to the undeformed one, the FuC is obtained and the response of the beam presents frequency components in a wide range, even though the resonant frequency of the cantilever beam is not excited. The results are hence in agreement with the expected behavior: if the device, forced in the second stable configuration, is subject to a low-frequency excitation whose amplitude exceeds a threshold, STB is triggered and the ensuing FuC provokes a widening of the beam vibrations frequency range and consequently a significant effectiveness in terms of power output. A maximum power of 4 mW is obtained by using an optimal resistive load as STB from a stable configuration of the bistable mechanism to the other one is triggered; a maximum energy of <inline-formula> <math display="inline"> <semantics> <mrow> <mn>4</mn> <mo>.</mo> <mn>5</mn> </mrow> </semantics> </math> </inline-formula><inline-formula> <math display="inline"> <semantics> <mi mathvariant="normal">J</mi> </semantics> </math> </inline-formula> is obtained in case of a rectifier circuit with storage capacitor. |
topic |
piezoelectric converters energy harvesting snap-through buckling frequency-up conversion |
url |
https://www.mdpi.com/2076-3417/10/10/3614 |
work_keys_str_mv |
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