Tunable nonlinear piezoelectric vibration harvester

Neiss, S; Goldschmidtboeing, Frank; Kroener, Michael; Woias, Peter

doi:10.1088/1742-6596/557/1/012113

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…The same approach was further investigated by Hoffmann et al in [ 35 ], with a smart and power-efficient self-adaptive energy harvesting system which was able to adapt its eigenfrequency to the ambient operating conditions of power units. Furthermore, numerous autonomous self-adaptive and power-efficient energy harvesting systems were introduced in [ 36 , 37 , 38 , 39 ]. Fu et al [ 40 , 41 ] presented and analyzed a broadband rotational energy harvester which uses bistability and frequency up-conversion.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Characterization of Optimized Dual-Frequency Vibration Energy Harvesters for Low-Power Industrial Applications

Bouhedma

Schütz

et al. 2022

Micromachines

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We present a multiresonant vibration energy harvester designed for ultra-low-power applications in industrial environments together with an optimized harvester design. The proposed device features dual-frequency operation, enabling the harvesting of energy over a wider operational frequency range. It has been designed such that its harvesting bandwidth range is [50, 100] Hz, which is a typical frequency range for vibrations found in industrial applications. At an excitation level of 0.5 g, a maximum mean power output of 6 mW and 9 mW can be expected at the resonance frequencies of 63.3 and 76.4 Hz, respectively. The harvester delivers a power density of 492 µW/cm2. Design optimization led to improved harvester geometries yielding up to 2.6 times closer resonance frequencies, resulting in a wider harvesting bandwidth and a significantly higher power output.

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Section: Introductionmentioning

confidence: 99%

Analysis and Characterization of Optimized Dual-Frequency Vibration Energy Harvesters for Low-Power Industrial Applications

Bouhedma

Schütz

et al. 2022

Micromachines

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“…The harvesting is achieved by magnetic plucking of a piezoelectric cantilever using a driving magnet mounted on a rotating platform. In [27][28][29] an autonomous tuning mechanism has been developed, allowing a compensation of the hysteresis, as well as maintaining the optimal working point. It allows the use of both coupling modes (attractive and repulsive), which enables the harvester to adapt its operating frequency to the dominant vibration frequency of the environment.…”

Section: Introductionmentioning

confidence: 99%

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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“…Alternatively, various groups [ 6 , 7 , 8 , 9 , 10 ] demonstrated the usability of bi-stable resonators for harvesting on a wider bandwidth, by integrating permanent magnets positioned with respect to another permanent magnet on the resonator. In [ 11 , 12 ] a tuning mechanism has been developed, allowing compensation of the hysteresis as well as maintaining the optimal working point. Other research [ 13 ] adapts the magnetic field strength, acting on the resonator, by orienting a circular permanent magnet.…”

Section: Introductionmentioning

confidence: 99%

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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Tunable nonlinear piezoelectric vibration harvester

Cited by 9 publications

References 4 publications

Analysis and Characterization of Optimized Dual-Frequency Vibration Energy Harvesters for Low-Power Industrial Applications

Analysis and Characterization of Optimized Dual-Frequency Vibration Energy Harvesters for Low-Power Industrial Applications

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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