Sandwich piezoelectric energy harvester : analytical modeling and experimental validation
Piezoelectric energy harvesting from ambient vibration sources has great potential for powering microelectronic devices and wireless sensors. Almost all the conventional piezoelectric energy harvesters (CPEHs) in the literature have been designed with a single metallic layer as substrate along with...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/144663 |
| _version_ | 1811690555614167040 |
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| author | Li, Xiangyang Upadrashta, Deepesh Yu, Kaiping Yang, Yaowen |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Li, Xiangyang Upadrashta, Deepesh Yu, Kaiping Yang, Yaowen |
| author_sort | Li, Xiangyang |
| collection | NTU |
| description | Piezoelectric energy harvesting from ambient vibration sources has great potential for powering microelectronic devices and wireless sensors. Almost all the conventional piezoelectric energy harvesters (CPEHs) in the literature have been designed with a single metallic layer as substrate along with the piezoelectric material bonded over it. In this work, a novel sandwich structure is used as substrate for designing harvester. The substrate structure comprises of a soft-core material sandwiched between metallic layers. The proposed sandwich piezoelectric energy harvester (SPEH) has lower resonant frequency and generates higher voltage output than the CPEH with the same geometrical dimension. Furthermore, the SPEH offers high design flexibility in terms of tuning the resonant frequency through selection of materials and geometric parameters for the core and metal layers. The mathematical formulation of a generalized electromechanical model of the SPEH is developed using the Lagrange approach. The natural frequencies, displacement and voltage frequency response functions of the harvester are obtained analytically. A single-degree-of-freedom model for the SPEH is also derived. Subsequently, the analytical modeling is validated by finite element simulations and experimental results. When excited at 0.1 g, the SPEH generates 18.8% more voltage output at resonance as compared with a CPEH with the same geometrical dimension and tip mass accompanied by 24% reduction in resonant frequency. At 30 Hz resonance frequency, CPEH generates open-circuit voltage 17.6 V using 15 g of tip mass whereas SPEH uses only 8.2 g of tip mass to generate 16.6 V. SPEH generates 130.8 μW, 426.6 μW and 1158.0 μW at base accelerations 0.05 g, 0.1 g and 0.2 g with optimal resistance, respectively. Finally, the influence of geometric and material properties of core and metallic layers on the performance of SPEH are analyzed comprehensively. The proposed novel SPEH together with its analytical modeling is intended to serve as a basis for future sandwich harvester designs. |
| first_indexed | 2024-10-01T06:05:52Z |
| format | Journal Article |
| id | ntu-10356/144663 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:05:52Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1446632020-11-17T08:10:11Z Sandwich piezoelectric energy harvester : analytical modeling and experimental validation Li, Xiangyang Upadrashta, Deepesh Yu, Kaiping Yang, Yaowen School of Civil and Environmental Engineering Engineering::Civil engineering Piezoelectric Harvester Sandwich Substrate Piezoelectric energy harvesting from ambient vibration sources has great potential for powering microelectronic devices and wireless sensors. Almost all the conventional piezoelectric energy harvesters (CPEHs) in the literature have been designed with a single metallic layer as substrate along with the piezoelectric material bonded over it. In this work, a novel sandwich structure is used as substrate for designing harvester. The substrate structure comprises of a soft-core material sandwiched between metallic layers. The proposed sandwich piezoelectric energy harvester (SPEH) has lower resonant frequency and generates higher voltage output than the CPEH with the same geometrical dimension. Furthermore, the SPEH offers high design flexibility in terms of tuning the resonant frequency through selection of materials and geometric parameters for the core and metal layers. The mathematical formulation of a generalized electromechanical model of the SPEH is developed using the Lagrange approach. The natural frequencies, displacement and voltage frequency response functions of the harvester are obtained analytically. A single-degree-of-freedom model for the SPEH is also derived. Subsequently, the analytical modeling is validated by finite element simulations and experimental results. When excited at 0.1 g, the SPEH generates 18.8% more voltage output at resonance as compared with a CPEH with the same geometrical dimension and tip mass accompanied by 24% reduction in resonant frequency. At 30 Hz resonance frequency, CPEH generates open-circuit voltage 17.6 V using 15 g of tip mass whereas SPEH uses only 8.2 g of tip mass to generate 16.6 V. SPEH generates 130.8 μW, 426.6 μW and 1158.0 μW at base accelerations 0.05 g, 0.1 g and 0.2 g with optimal resistance, respectively. Finally, the influence of geometric and material properties of core and metallic layers on the performance of SPEH are analyzed comprehensively. The proposed novel SPEH together with its analytical modeling is intended to serve as a basis for future sandwich harvester designs. 2020-11-17T08:10:11Z 2020-11-17T08:10:11Z 2018 Journal Article Li, X., Upadrashta, D., Yu, K., & Yang, Y. (2018). Sandwich piezoelectric energy harvester : analytical modeling and experimental validation. Energy Conversion and Management, 176, 69-85. doi:10.1016/j.enconman.2018.09.014 0196-8904 https://hdl.handle.net/10356/144663 10.1016/j.enconman.2018.09.014 176 69 85 en Energy Conversion and Management © 2018 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Civil engineering Piezoelectric Harvester Sandwich Substrate Li, Xiangyang Upadrashta, Deepesh Yu, Kaiping Yang, Yaowen Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title | Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title_full | Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title_fullStr | Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title_full_unstemmed | Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title_short | Sandwich piezoelectric energy harvester : analytical modeling and experimental validation |
| title_sort | sandwich piezoelectric energy harvester analytical modeling and experimental validation |
| topic | Engineering::Civil engineering Piezoelectric Harvester Sandwich Substrate |
| url | https://hdl.handle.net/10356/144663 |
| work_keys_str_mv | AT lixiangyang sandwichpiezoelectricenergyharvesteranalyticalmodelingandexperimentalvalidation AT upadrashtadeepesh sandwichpiezoelectricenergyharvesteranalyticalmodelingandexperimentalvalidation AT yukaiping sandwichpiezoelectricenergyharvesteranalyticalmodelingandexperimentalvalidation AT yangyaowen sandwichpiezoelectricenergyharvesteranalyticalmodelingandexperimentalvalidation |