Self-sufficient electronic control for nonlinear, frequency tunable, piezoelectric vibration harvesters

Heller, S. R.; Neiss, S; Kroener, Michael; Woias, Peter

doi:10.1088/1742-6596/660/1/012024

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…Frequency tuning is another approach for broadening the working bandwidth of the piezoelectric energy harvester which aims to alter the resonance frequency of the energy harvester during its vibrating process. Active frequency tuning technique consumes additional energy to monitor the working condition of the energy harvester and tune the natural frequency of system by actively modulating structure stiffness [24][25][26][27][28]. In contrast, an energy harvester with passive frequency tuning capability can automatically adapt its resonance frequency to match the excitation frequency without additional energy consumption and human interventions by using a beam-slider structure.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of an auxetic piezoelectric energy harvester with frequency self-tuning capability

Zhang,

Chen,

Karimi

et al. 2024

Smart Mater. Struct.

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To deal with the limited availability of long-lasting power sources for sensor nodes in industrial environments, a novel piezoelectric energy harvester with high efficiency and a wide working bandwidth was designed to harvest broadband and random vibrations from the ambient environment. The developed energy harvester adopts a doubly clamped piezoelectric beam with a peanut-shaped auxetic structure to improve the power output. It also incorporates a sliding proof mass for frequency self-tuning, enabling a wider working bandwidth. As the doubly clamped beam exhibits geometry nonlinearity under large vibration amplitudes, the power output of the energy harvester can be further enhanced in the frequency self-tuning process. Finite element simulations are conducted to evaluate the impact of the auxetic structure and the position of the proof mass on the performance of the energy harvester. Experiments are performed to examine the energy harvesting performance of the proposed energy harvester. Under an excitation acceleration of 0.3 g, the use of the sliding proof mass widens the working bandwidth of the auxetic energy harvester (AEH) by 9 Hz, with the maximum RMS output power of AEH reaching 18.78 μW, which is much higher than that of the plain energy harvester (PEH) or the AEH with a fixed proof mass. The developed energy harvester can successfully power a wireless temperature and humidity sensor node based on the vibration produced by a centrifuge, which demonstrates the practical feasibility of the proposed energy harvester for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of an auxetic piezoelectric energy harvester with frequency self-tuning capability

Zhang,

Chen,

Karimi

et al. 2024

Smart Mater. Struct.

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“…Numerical and experimental results showed that the harvester worked effectively in a wide bandwidth in a low-frequency (\10 Hz) range even under weak base acceleration. Broadband energy harvesters based on softening nonlinearity are widely reported due to the resulting larger bandwidth and ease of harnessing lower frequency vibration energy (Heller et al, 2015;Stanton et al, 2009;Vandewater and Moss, 2013;Wang et al, 2020c;Yan et al, 2019). Fan et al (2018) proposed a monostable piezoelectric energy harvester for extracting energy from low-level vibrations by introducing symmetric magnetic attraction for softening nonlinearity and simultaneously using a pair of stoppers to confine the deflection of the beam.…”

Section: Introductionmentioning

confidence: 99%

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Chen

Eager

Zhao

2021

Journal of Intelligent Material Systems and Structures

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This paper proposes a softening nonlinear aeroelastic galloping energy harvester for enhanced energy harvesting from concurrent wind flow and base vibration. Traditional linear aeroelastic energy harvesters have poor performance with quasi-periodic oscillations when the base vibration frequency deviates from the aeroelastic frequency. The softening nonlinearity in the proposed harvester alters the self-excited galloping frequency and simultaneously extends the large-amplitude base-excited oscillation to a wider frequency range, achieving frequency synchronization over a remarkably broadened bandwidth with periodic oscillations for efficient energy conversion from dual sources. A fully coupled aero-electro-mechanical model is built and validated with measurements on a devised prototype. At a wind speed of 5.5 m/s and base acceleration of 0.1 g, the proposed harvester improves the performance by widening the effective bandwidth by 300% compared to the linear counterpart without sacrificing the voltage level. The influences of nonlinearity configuration, excitation magnitude, and electromechanical coupling strength on the mechanical and electrical behavior are examined. The results of this paper form a baseline for future efficiency enhancement of energy harvesting from concurrent wind and base vibration utilizing monostable stiffness nonlinearities.

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Extremum seeking control of a self-tunable variable-inertia vibration energy harvester: Modeling and experimental validation

Abdelazim,

Anis,

Shaltout

2024

Energy Conversion and Management

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Self-sufficient electronic control for nonlinear, frequency tunable, piezoelectric vibration harvesters

Cited by 4 publications

References 5 publications

Numerical and experimental investigation of an auxetic piezoelectric energy harvester with frequency self-tuning capability

Numerical and experimental investigation of an auxetic piezoelectric energy harvester with frequency self-tuning capability

Enhanced frequency synchronization for concurrent aeroelastic and base vibratory energy harvesting using a softening nonlinear galloping energy harvester

Extremum seeking control of a self-tunable variable-inertia vibration energy harvester: Modeling and experimental validation

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