Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet
Nonlinear multi-stable piezoelectric energy harvesters show broadband frequency spectra and excellent energy harvesting performance, owing to their high output power related to inter-well transitions. However, existing quad-stable piezoelectric energy harvesters contain too many structural parameter...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Machines |
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| Online Access: | https://www.mdpi.com/2075-1702/10/9/803 |
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| author | Shuailing Sun Yonggang Leng Sunghoon Hur Fei Sun Xukun Su Hyun-Cheol Song Chong-Yun Kang |
| author_facet | Shuailing Sun Yonggang Leng Sunghoon Hur Fei Sun Xukun Su Hyun-Cheol Song Chong-Yun Kang |
| author_sort | Shuailing Sun |
| collection | DOAJ |
| description | Nonlinear multi-stable piezoelectric energy harvesters show broadband frequency spectra and excellent energy harvesting performance, owing to their high output power related to inter-well transitions. However, existing quad-stable piezoelectric energy harvesters contain too many structural parameters, which makes the systems clumsy, and increases the difficulties of dynamic analysis and structural optimization. Herein, a nonlinear quad-stable piezoelectric energy harvester, with only one external magnet, is proposed based on the magnetic force characteristics between a ring magnet and a rectangular magnet. Under selected structural parameters, as the magnet spacing increases, the stability characteristic of the harvester changes from quad-stability to bi-stability, and then to mono-stability. The transformation of the stability characteristic results from the changes in the variation rate of the vertical magnetic force. Subsequently, under the filtered Gaussian white noise within the frequency range of 0–120 Hz, the energy harvesting performance of the harvester is simulated by the classic fourth-order Runge-Kutta method. Simulation results show that the performance of the harvester under the quad-stable structural parameters is better than that under the bi-stable structural parameters, independent of whether the excitation acceleration is small or large. This result is related to the potential well characteristics under the quad-stable and bi-stable structural parameters. More specifically, the potential well depths under the quad-stable and bi-stable structural parameters are almost the same, but the distance between the two outer potential wells under the quad-stable structural parameters is larger than that under the bi-stable structural parameters. Finally, a fabricated prototype is used to measure the experimental performance of the harvester. The experimental data and the estimated data share the same trend. This study provides a new conception and technical method for the design, optimization, and application of quad-stable piezoelectric energy harvesters. |
| first_indexed | 2024-03-09T23:20:41Z |
| format | Article |
| id | doaj.art-96bbf011312e439bae87426a4bdff32c |
| institution | Directory Open Access Journal |
| issn | 2075-1702 |
| language | English |
| last_indexed | 2024-03-09T23:20:41Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Machines |
| spelling | doaj.art-96bbf011312e439bae87426a4bdff32c2023-11-23T17:27:08ZengMDPI AGMachines2075-17022022-09-0110980310.3390/machines10090803Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External MagnetShuailing Sun0Yonggang Leng1Sunghoon Hur2Fei Sun3Xukun Su4Hyun-Cheol Song5Chong-Yun Kang6School of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaSchool of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaElectronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaSchool of Foreign Languages and Literature, Tianjin University, Tianjin 300350, ChinaSchool of Mechanical Engineering, Tianjin University, Tianjin 300350, ChinaElectronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaElectronic Materials Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, KoreaNonlinear multi-stable piezoelectric energy harvesters show broadband frequency spectra and excellent energy harvesting performance, owing to their high output power related to inter-well transitions. However, existing quad-stable piezoelectric energy harvesters contain too many structural parameters, which makes the systems clumsy, and increases the difficulties of dynamic analysis and structural optimization. Herein, a nonlinear quad-stable piezoelectric energy harvester, with only one external magnet, is proposed based on the magnetic force characteristics between a ring magnet and a rectangular magnet. Under selected structural parameters, as the magnet spacing increases, the stability characteristic of the harvester changes from quad-stability to bi-stability, and then to mono-stability. The transformation of the stability characteristic results from the changes in the variation rate of the vertical magnetic force. Subsequently, under the filtered Gaussian white noise within the frequency range of 0–120 Hz, the energy harvesting performance of the harvester is simulated by the classic fourth-order Runge-Kutta method. Simulation results show that the performance of the harvester under the quad-stable structural parameters is better than that under the bi-stable structural parameters, independent of whether the excitation acceleration is small or large. This result is related to the potential well characteristics under the quad-stable and bi-stable structural parameters. More specifically, the potential well depths under the quad-stable and bi-stable structural parameters are almost the same, but the distance between the two outer potential wells under the quad-stable structural parameters is larger than that under the bi-stable structural parameters. Finally, a fabricated prototype is used to measure the experimental performance of the harvester. The experimental data and the estimated data share the same trend. This study provides a new conception and technical method for the design, optimization, and application of quad-stable piezoelectric energy harvesters.https://www.mdpi.com/2075-1702/10/9/803piezoelectric energy harvestingmulti-stable systemcantilever beam structurenonlinear dynamicsrandom excitation |
| spellingShingle | Shuailing Sun Yonggang Leng Sunghoon Hur Fei Sun Xukun Su Hyun-Cheol Song Chong-Yun Kang Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet Machines piezoelectric energy harvesting multi-stable system cantilever beam structure nonlinear dynamics random excitation |
| title | Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet |
| title_full | Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet |
| title_fullStr | Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet |
| title_full_unstemmed | Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet |
| title_short | Energy Harvesting Performance of a Novel Nonlinear Quad-Stable Piezoelectric Energy Harvester with Only One External Magnet |
| title_sort | energy harvesting performance of a novel nonlinear quad stable piezoelectric energy harvester with only one external magnet |
| topic | piezoelectric energy harvesting multi-stable system cantilever beam structure nonlinear dynamics random excitation |
| url | https://www.mdpi.com/2075-1702/10/9/803 |
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