Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester
Vibration-based energy harvesting via microelectromechanical system- (MEMS-) scale devices presents numerous challenges due to difficulties in maximizing power output at low driving frequencies. This work investigates the performance of a uniquely designed microscale bistable vibration energy harves...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/6743676 |
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| author | Masoud Derakhshani Thomas A. Berfield |
| author_facet | Masoud Derakhshani Thomas A. Berfield |
| author_sort | Masoud Derakhshani |
| collection | DOAJ |
| description | Vibration-based energy harvesting via microelectromechanical system- (MEMS-) scale devices presents numerous challenges due to difficulties in maximizing power output at low driving frequencies. This work investigates the performance of a uniquely designed microscale bistable vibration energy harvester featuring a central buckled beam coated with a piezoelectric layer. In this design, the central beam is pinned at its midpoint by using a torsional rod, which in turn is connected to two cantilever arms designed to induce bistable motion of the central buckled beam. The ability to induce switching between stable states is a critical strategy for boosting power output of MEMS. This study presents the formulation of a model to analyze the static and dynamic behaviors of the coupled structure, with a focus on the evolution of elongation strain within the piezoelectric layer. Cases of various initial buckling stress levels, driving frequencies, and driving amplitude were considered to identify regimes of viable energy harvesting. Results showed that bistable-state switching, or snap-through motion of the buckled beam, produced a significant increase in power production potential over a range of driving frequencies. These results indicate that optimal vibration scavenging requires an approach that balances the initial buckling stress level with the expected range of driving frequencies for a particular environment. |
| format | Article |
| id | doaj-art-aa5eecf69ab74ba08c821115b4d851ae |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-aa5eecf69ab74ba08c821115b4d851ae2025-02-03T01:30:58ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/67436766743676Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy HarvesterMasoud Derakhshani0Thomas A. Berfield1Mechanical Engineering Department, University of Louisville, Louisville, KY 40292, USAMechanical Engineering Department, University of Louisville, Louisville, KY 40292, USAVibration-based energy harvesting via microelectromechanical system- (MEMS-) scale devices presents numerous challenges due to difficulties in maximizing power output at low driving frequencies. This work investigates the performance of a uniquely designed microscale bistable vibration energy harvester featuring a central buckled beam coated with a piezoelectric layer. In this design, the central beam is pinned at its midpoint by using a torsional rod, which in turn is connected to two cantilever arms designed to induce bistable motion of the central buckled beam. The ability to induce switching between stable states is a critical strategy for boosting power output of MEMS. This study presents the formulation of a model to analyze the static and dynamic behaviors of the coupled structure, with a focus on the evolution of elongation strain within the piezoelectric layer. Cases of various initial buckling stress levels, driving frequencies, and driving amplitude were considered to identify regimes of viable energy harvesting. Results showed that bistable-state switching, or snap-through motion of the buckled beam, produced a significant increase in power production potential over a range of driving frequencies. These results indicate that optimal vibration scavenging requires an approach that balances the initial buckling stress level with the expected range of driving frequencies for a particular environment.http://dx.doi.org/10.1155/2019/6743676 |
| spellingShingle | Masoud Derakhshani Thomas A. Berfield Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester Shock and Vibration |
| title | Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester |
| title_full | Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester |
| title_fullStr | Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester |
| title_full_unstemmed | Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester |
| title_short | Snap-Through and Mechanical Strain Analysis of a MEMS Bistable Vibration Energy Harvester |
| title_sort | snap through and mechanical strain analysis of a mems bistable vibration energy harvester |
| url | http://dx.doi.org/10.1155/2019/6743676 |
| work_keys_str_mv | AT masoudderakhshani snapthroughandmechanicalstrainanalysisofamemsbistablevibrationenergyharvester AT thomasaberfield snapthroughandmechanicalstrainanalysisofamemsbistablevibrationenergyharvester |