Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester
The harvesting efficiency of a cantilevered piezoelectric energy harvester is limited by its uneven strain distribution. Moreover, a cantilevered harvester requires a large workspace due to the large displacement of its free end. To address these issues, a novel piezoelectric energy harvester based...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-06-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/13/5895 |
| _version_ | 1827734453666971648 |
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| author | Wei-Jiun Su Chu-Hsiang Tseng |
| author_facet | Wei-Jiun Su Chu-Hsiang Tseng |
| author_sort | Wei-Jiun Su |
| collection | DOAJ |
| description | The harvesting efficiency of a cantilevered piezoelectric energy harvester is limited by its uneven strain distribution. Moreover, a cantilevered harvester requires a large workspace due to the large displacement of its free end. To address these issues, a novel piezoelectric energy harvester based on an extended simply supported beam is proposed. The proposed design features a simply supported piezoelectric main beam with an extended beam attached to its roller end and a tip mass to reduce the resonant frequency. The theoretical model of the proposed piezoelectric energy harvester is developed based on the Euler–Bernoulli beam theory. The model has been experimentally validated through the fabrication of a prototype. The extended beam and tip mass are adjusted to see their influence on the performance of the harvester. The resonant frequency can be maintained by shortening the extended beam and increasing the tip mass simultaneously. A shorter extend beam leads to a more even strain distribution in the piezoelectric layer, resulting in an enhanced output voltage. Moreover, the simulation results show that a torsional spring is installed on the roller joint which greatly influences the voltage output. The strain distribution becomes more even when proper compressive preload is applied on the main beam. Experiments have shown that the proposed design enhances the output power by 86% and reduces tip displacement by 63.2% compared to a traditional cantilevered harvester. |
| first_indexed | 2024-03-11T01:29:19Z |
| format | Article |
| id | doaj.art-5a276fb05dbc45268655215610517722 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T01:29:19Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-5a276fb05dbc452686552156105177222023-11-18T17:28:19ZengMDPI AGSensors1424-82202023-06-012313589510.3390/s23135895Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy HarvesterWei-Jiun Su0Chu-Hsiang Tseng1Department of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, TaiwanDepartment of Mechanical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Rd., Taipei 10617, TaiwanThe harvesting efficiency of a cantilevered piezoelectric energy harvester is limited by its uneven strain distribution. Moreover, a cantilevered harvester requires a large workspace due to the large displacement of its free end. To address these issues, a novel piezoelectric energy harvester based on an extended simply supported beam is proposed. The proposed design features a simply supported piezoelectric main beam with an extended beam attached to its roller end and a tip mass to reduce the resonant frequency. The theoretical model of the proposed piezoelectric energy harvester is developed based on the Euler–Bernoulli beam theory. The model has been experimentally validated through the fabrication of a prototype. The extended beam and tip mass are adjusted to see their influence on the performance of the harvester. The resonant frequency can be maintained by shortening the extended beam and increasing the tip mass simultaneously. A shorter extend beam leads to a more even strain distribution in the piezoelectric layer, resulting in an enhanced output voltage. Moreover, the simulation results show that a torsional spring is installed on the roller joint which greatly influences the voltage output. The strain distribution becomes more even when proper compressive preload is applied on the main beam. Experiments have shown that the proposed design enhances the output power by 86% and reduces tip displacement by 63.2% compared to a traditional cantilevered harvester.https://www.mdpi.com/1424-8220/23/13/5895piezoelectric energy harvestersimply supported beamstrain distribution |
| spellingShingle | Wei-Jiun Su Chu-Hsiang Tseng Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester Sensors piezoelectric energy harvester simply supported beam strain distribution |
| title | Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester |
| title_full | Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester |
| title_fullStr | Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester |
| title_full_unstemmed | Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester |
| title_short | Design and Analysis of an Extended Simply Supported Beam Piezoelectric Energy Harvester |
| title_sort | design and analysis of an extended simply supported beam piezoelectric energy harvester |
| topic | piezoelectric energy harvester simply supported beam strain distribution |
| url | https://www.mdpi.com/1424-8220/23/13/5895 |
| work_keys_str_mv | AT weijiunsu designandanalysisofanextendedsimplysupportedbeampiezoelectricenergyharvester AT chuhsiangtseng designandanalysisofanextendedsimplysupportedbeampiezoelectricenergyharvester |