A flute-inspired broadband piezoelectric vibration energy harvesting device with mechanical intelligent design

Wang, Zhemin; Du, Yu; Li, Tianrun; Yan, Zhimiao; Tan, Ting

doi:10.1016/j.apenergy.2021.117577

Cited by 39 publications

(14 citation statements)

References 39 publications

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“…This problem can be partially solved designing systems capable to self adapt, i.e. adjust their resonant frequency to that of the external stimulus [18,19,20,21]. However, in the vast majority of practical applications the load resistance is fixed a priori, and cannot be adjusted to match the harvester resistance.…”

Section: System Description and Modelingmentioning

confidence: 99%

Stochastic analysis of a bistable piezoelectric energy harvester with a matched electrical load

Bonnin

Song

Traversa

et al. 2023

Preprint

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We present the analysis of a bistable piezoelectric energy harvester with matched electrical load, subject to random mechanical vibrations. The matching network optimizes the average energy transfer to the electrical load. The system is described by a set of nonlinear stochastic differential equations. A perturbation method is used to find an approximate solution of the stochastic system in the weak noise limit, and this solution is used to optimize the circuit parameters of the matching network. In the strong noise limit, the state equations are integrated numerically to determine the average power absorbed by the load and the power efficiency. Our analysis shows that the application of a properly designed matching network improves the performances by a significant amount, as the power delivered to the load improves of a factor about 9 with respect to a direct connection.

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Section: System Description and Modelingmentioning

confidence: 99%

Stochastic analysis of a bistable piezoelectric energy harvester with a matched electrical load

Bonnin

Song

Traversa

et al. 2023

Preprint

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show abstract

“…Wang proposed a flute-inspired mechanical-intelligent piezoelectric energy harvester to achieve self-tracking vibration frequency without manual intervention. This new energy harvester demonstrates a significant improvement of 610% in working bandwidth and an increase in power of 348% [17]. Z.B.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Output Performance of a Novel Symmetrical T-Shaped Trapezoidal Micro Piezoelectric Energy Harvester Using a PZT-5H

Zhou

et al. 2022

Micromachines

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In recent years, low-power wireless sensors with high flexibility, portability and computing capability have been extensively applied in areas such as military, medicine and mechanical equipment condition monitoring. In this paper, a novel symmetrical T-shaped trapezoidal micro piezoelectric energy harvester (STTM-PEH) is proposed to supply energy for wireless sensors monitoring the vibrations of mechanical equipment. Firstly, the finite element model (FEM) of the STTM-PEH is established. Secondly, the modal analysis of the T-shaped trapezoidal piezoelectric cantilever beam is carried out by finite element software and its vibration modes are obtained. Additionally, the structural characteristics of the STTM-PEH and the composition of piezoelectric patches are described. Furthermore, the effects of resistance, acceleration coefficient, substrate materials and structural parameters of the output performance of the STTM-PEH are researched. The results indicate that the output power of the STTM-PEH rises first and then falls with a change in resistance, while the output voltage does not increase as resistance increases to a certain extent. Meanwhile, selecting copper as the piezoelectric material of the T-shaped trapezoidal piezoelectric cantilever beam can generate a higher energy output. Finally, how the structural parameters, including piezoelectric patch thickness, substrate thickness and cantilever head length, affect the output performance of the STTM-PEH is studied, which illustrates that the load range of the STTM-PEH can be appropriately broadened by adjusting the length of the cantilever beam head. This research is valuable for designing a novel high performance piezoelectric energy harvester.

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“…Consequently, this scheme can well capture the low-frequency vibrations and then realize a high-frequency, efficient mechanical-electrical conversion. In terms of broadband harvesting, multimodal approach and structural nonlinearity are often utilized [ 21 , 22 ]. The former can produce several resonant peaks in a certain frequency range with the helps from segmented beam-mass and multi-unit configurations [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Multimodal Multidirectional Piezoelectric Vibration Energy Harvester by U-Shaped Structure with Cross-Connected Beams

Jiang

et al. 2022

Micromachines

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This paper proposes a multidirectional piezoelectric vibration energy harvester based on an improved U-shaped structure with cross-connected beams. Benefitting from the bi-directional capacity of U-shaped beam and additional bending mode induced by cross-connected configuration, the proposed structure can well capture the vibrations in 3D space at the frequencies lower than 15 Hz. These features are further validated by finite element analyses and theorical formulas. The prototype is fabricated and the experiments under different conditions are carried out. The results show that the proposed harvester can generate favorable voltage and power under multidirectional vibrations at a low operating frequency. Practical applications of charging capacitors and powering a wireless sensor node demonstrate the feasibility of this energy harvester in supplying power for engineering devices.

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A flute-inspired broadband piezoelectric vibration energy harvesting device with mechanical intelligent design

Cited by 39 publications

References 39 publications

Stochastic analysis of a bistable piezoelectric energy harvester with a matched electrical load

Stochastic analysis of a bistable piezoelectric energy harvester with a matched electrical load

Analysis of Output Performance of a Novel Symmetrical T-Shaped Trapezoidal Micro Piezoelectric Energy Harvester Using a PZT-5H

Multimodal Multidirectional Piezoelectric Vibration Energy Harvester by U-Shaped Structure with Cross-Connected Beams

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