Simulation and Characterization of a Nonlinear Dual-Frequency Piezoelectric Energy Harvester

Bouhedma, Sofiane; Zheng, Yuhang; Hohlfeld, Dennis

doi:10.3390/proceedings2130908

Cited by 2 publications

(8 citation statements)

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“…This section reviews shortly the dual-frequency harvester proposed in [32][33][34] together with its tuning approach. Continuing our modelling effort from [34] we advance the finite element (FE) model into a system-level model.…”

Section: Dual Frequency Piezoelectric Energy Harvestermentioning

confidence: 99%

“…The multiphysics part comprises the ROM, which describes the mechanical and piezoelectric behavior of the harvester. The magnetic forces have been derived from magneto-static simulations [33] and implemented in the model as force functions 1 and 2. The magnetic force will alter the effective stiffness of the resonator.…”

Section: System-level Simulationmentioning

confidence: 99%

“…The two fundamental modes appear at 63.1 and 77.5 Hz. Furthermore, the aforementioned frequencies have been compared to the experimental results obtained in [33], which are 62.6 and 76.1 Hz.…”

Section: Mechanical Resonator Reduced Order Modelmentioning

confidence: 99%

“…Nammari et al [30] proposed an enhanced novel design of a nonlinear magnetic levitation-based energy harvester, where the tuning effect is achieved by the magnetic and the oblique springs. In [31][32][33][34] we studied a dual-frequency piezoelectric energy harvester incorporating permanent magnets for bidirectional frequency tuning and presenting an increased useable frequency range compared to standard harvesters. Other groups used different bandwidth broadening strategies, for example, shunted piezoelectric control systems have been proposed in [35,36].…”

Section: Introductionmentioning

confidence: 99%

“…A reduced model of the harvester has been developed and enabled us to fully simulate the behavior of the harvester in question. The position-dependent magnetic force obtained from magnetostatic simulations presented in [33] have been implemented together with the reduced model in ANSYS twin builder. The system is able to autonomously choose and tune the closest mode to the dominant vibration frequency to maintain maximum possible oscillation amplitude.…”

Section: Introductionmentioning

confidence: 99%

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System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

et al. 2020

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In this paper, we present a macroscale multiresonant vibration-based energy harvester. The device features frequency tunability through magnetostatic actuation on the resonator. The magnetic tuning scheme uses external magnets on linear stages. The system-level model demonstrates autonomous adaptation of resonance frequency to the dominant ambient frequencies. The harvester is designed such that its two fundamental modes appear in the range of (50,100) Hz which is a typical frequency range for vibrations found in industrial applications. The dual-frequency characteristics of the proposed design together with the frequency agility result in an increased operative harvesting frequency range. In order to allow a time-efficient simulation of the model, a reduced order model has been derived from a finite element model. A tuning control algorithm based on maximum-voltage tracking has been implemented in the model. The device was characterized experimentally to deliver a power output of 500 µW at an excitation level of 0.5 g at the respected frequencies of 63.3 and 76.4 Hz. In a design optimization effort, an improved geometry has been derived. It yields more close resonance frequencies and optimized performance.

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Section: Dual Frequency Piezoelectric Energy Harvestermentioning

confidence: 99%

Section: System-level Simulationmentioning

confidence: 99%

Section: Mechanical Resonator Reduced Order Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

et al. 2020

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Magnetic Frequency Tuning of a Multimodal Vibration Energy Harvester

Bouhedma

Zheng

Lange

et al. 2019

Sensors

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In this paper, we present a novel vibration-based piezoelectric energy harvester, capable of collecting power at multiple operating frequencies and autonomously adapting itself to the dominant ambient frequencies. It consists of a compact dual-frequency resonator designed such that the first two fundamental natural frequencies are in the range of [50, 100] Hz, which is a typical frequency range for ambient vibrations in industrial environments. A magnetic frequency-tuning scheme is incorporated into the structure, which enables the frequency agility of the system. In contrast to single frequency harvesters, the presented approach combines multi-resonance and frequency tunability of both modes enabling a larger operative bandwidth. We experimentally demonstrate independent bi-directional tunability of our dual-frequency design. Furthermore, a control algorithm based on maximum amplitude tracking has been implemented for self-adaption of the system. The latter has been demonstrated in a system-level simulation model, which integrates the dual-frequency resonator, the magnetic tuning, and the control algorithm.

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Simulation and Characterization of a Nonlinear Dual-Frequency Piezoelectric Energy Harvester

Cited by 2 publications

References 5 publications

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

System-Level Model and Simulation of a Frequency-Tunable Vibration Energy Harvester

Magnetic Frequency Tuning of a Multimodal Vibration Energy Harvester

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