Efficient broadband vibration energy harvesting based on tuned non-linearity and energy localization

Aouali, Kaouthar; Kacem, Najib; Bouhaddi, Noureddine; Mrabet, Elyes; Haddar, Mohamed

doi:10.1088/1361-665x/abaa95

Cited by 25 publications

(20 citation statements)

References 23 publications

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“…The effectiveness of the vibration energy harvesters equipped with nonlinear mechanical components has been discussed [ 55 , 56 , 57 , 58 ]. They reported that the initial values determine their superiority or inferiority of performance between harvesters equipped with linear and nonlinear mechanical components.…”

Section: Discussionmentioning

confidence: 99%

Adaptive and Robust Operation with Active Fuzzy Harvester under Nonstationary and Random Disturbance Conditions

Hara

Otsuka

Makihara

2021

Sensors

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The objective of this paper is to amplify the output voltage magnitude from a piezoelectric vibration energy harvester under nonstationary and broadband vibration conditions. Improving the transferred energy, which is converted from mechanical energy to electrical energy through a piezoelectric transducer, achieved a high output voltage and effective harvesting. A threshold-based switching strategy is used to improve the total transferred energy with consideration of the signs and amplitudes of the electromechanical conditions of the harvester. A time-invariant threshold cannot accomplish effective harvesting under nonstationary vibration conditions because the assessment criterion for desirable control changes in accordance with the disturbance scale. To solve this problem, we developed a switching strategy for the active harvester, namely, adaptive switching considering vibration suppression-threshold strategy. The strategy adopts a tuning algorithm for the time-varying threshold and implements appropriate intermittent switching without pre-tuning by means of the fuzzy control theory. We evaluated the proposed strategy under three realistic vibration conditions: a frequency sweep, a change in the number of dominant frequencies, and wideband frequency vibration. Experimental comparisons were conducted with existing strategies, which consider only the signs of the harvester electromechanical conditions. The results confirm that the presented strategy achieves a greater output voltage than the existing strategies under all nonstationary vibration conditions. The average amplification rate of output voltage for the proposed strategy is 203% compared with the output voltage by noncontrolled harvesting.

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Section: Discussionmentioning

confidence: 99%

Adaptive and Robust Operation with Active Fuzzy Harvester under Nonstationary and Random Disturbance Conditions

Hara

Otsuka

Makihara

2021

Sensors

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“…Following this study, it has been concluded that the energy can be harvested from one perturbed magnet instead of two and only one electric circuit can be used while the maximum harvested energies are comparable and the bandwidth is enhanced compared to the results of the periodic structure. Subsequent work included the manufacturing and experimental characterization of the proposed device under harmonic excitations [41]. The nonlinearity level has been tuned by varying the critical resistances and the energy localization has been controlled by the mass mistuning.…”

Section: Numerical-experimental Confrontationmentioning

confidence: 99%

“…In this work, a multimodal electromagnetic vibration energy harvester with tuning nonlinear dynamics and energy localization is studied. The results of [40,41], allow the experimental validation of the 2-DOFs model. The validated 2-DOFs system is optimized using a multiobjective optimization procedure to improve the VEH harvested power and frequency bandwidth.…”

Section: Introductionmentioning

confidence: 96%

“…These methods proved that the introduction of nonlinear dynamics increases significantly the frequency bandwidth of the devices. In recent works published by the authors of this paper, the benefits of the combination of the nonlinearity and the energy localization phenomenon have been investigated in a two degrees-of-freedom (2-DOFs) system [40,41]. It has been proved that the introduction of nonlinear dynamics enhances the frequency bandwidth and offers a higher energy localization robustness compared to the linear systems.…”

Section: Introductionmentioning

confidence: 99%

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On the Optimization of a Multimodal Electromagnetic Vibration Energy Harvester Using Mode Localization and Nonlinear Dynamics

et al. 2021

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In this paper we study a generic model of a nonlinear quasiperiodic vibration energy harvester (VEH) based on electromagnetic transduction. The proposed device consists of multiple moving magnets guided by elastic beams and coupled by repulsive magnetic forces. A system of two degrees-of-freedom (DOFs) with tunable nonlinearity and mode localization is experimentally validated. The validated 2-DOFs harvester is optimized using a multiobjective optimization procedure to improve its harvested power and frequency bandwidth. An efficient criterion using the modal kinetic energy of the finite element model is proposed to quantify the energy localized in the structure perturbed zones. Afterward, this concept has been generalized to a 5-DOFs VEH with two perturbed DOFs oscillators and the optimal performances are derived using a multiobjective optimization. This proposed model enables a significant increase in the harvested power and frequency bandwidth by 101% and 79%, respectively, compared to that of the 2-DOFs device. Moreover, it has been shown that harvesting energy from two perturbed magnets among five provides almost the same amount of harvested energy and enhances the frequency bandwidth by 18% compared to those of the periodic system. Consequently, the harvester can be improved by reducing the transduction circuits number and the manufacturing cost.

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“…An energy localization and mechanical nonlinearity was produced as a result of large movement of the beams. The results showed improvements in the harvested power and frequency bandwidth compared with nonlinear devices [ 59 ]. An archetypal energy harvester was used to nonlinearly convert medium vibration into electrical power using electromagnetic induction.…”

Section: Introductionmentioning

confidence: 99%

Multi-Directional Universal Energy Harvesting Ball

Hall,

Rashidi

2021

Micromachines

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This paper discusses the development of a multi-directional, universal, electromagnetic energy harvester. The device is a ball consisting of two parts: a rigid spherical core with internal tubes, coils and magnets, and a flexible silicone-based shell holding a carrier fluid. The multi-directional aspect of the design comes from the device’s spherical shape. The harvester generates energy when subject to compressive force, by moving fluid through a tube, pushing a permanently magnetized ball through a coil wound around the tube. A combination of 3-D printed PLA plastic and molded silicone was used to produce a prototype. The energy harvester can be utilized in applications where there is an oscillating compression and it is not limited to certain applications due to its universal ball shape. It was tested at five different frequencies between 4–15 Hz on its four different outer sides producing electricity at a range of 17 to 44 mV.

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Efficient broadband vibration energy harvesting based on tuned non-linearity and energy localization

Cited by 25 publications

References 23 publications

Adaptive and Robust Operation with Active Fuzzy Harvester under Nonstationary and Random Disturbance Conditions

Adaptive and Robust Operation with Active Fuzzy Harvester under Nonstationary and Random Disturbance Conditions

On the Optimization of a Multimodal Electromagnetic Vibration Energy Harvester Using Mode Localization and Nonlinear Dynamics

Multi-Directional Universal Energy Harvesting Ball

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