Design of a nonlinear energy harvester based on high static low dynamic stiffness for low frequency random vibrations

Drezet, Cyril; Kacem, Najib; Bouhaddi, Noureddine

doi:10.1016/j.sna.2018.09.046

Cited by 45 publications

(28 citation statements)

References 40 publications

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“…It should be noted that, based on the present linear model, the electromechanical responses would perform well only in the narrow frequency zone close to the natural frequency. In practice, methods for performance enhancement have been developed by the use of nonlinearity [45][46][47][48] and multimodal techniques [49][50][51][52]. When the flexoelectric beam was shrunk proportionally to 0.3 μm in thickness, the voltage FRFs are plotted in Figure 3.…”

Section: Voltage Frfsmentioning

confidence: 99%

Analytical Electromechanical Modeling of Nanoscale Flexoelectric Energy Harvesting

Lin

Huang

et al. 2019

Applied Sciences

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With the attention focused on harvesting energy from the ambient environment for nanoscale electronic devices, electromechanical coupling effects in materials have been studied for many potential applications. Flexoelectricity can be observed in all dielectric materials, coupling the strain gradients and polarization, and may lead to strong size-dependent effects at the nanoscale. This paper investigates the flexoelectric energy harvesting under the harmonic mechanical excitation, based on a model similar to the classical Euler–Bernoulli beam theory. The electric Gibbs free energy and the generalized Hamilton’s variational principle for a flexoelectric body are used to derive the coupled governing equations for flexoelectric beams. The closed-form electromechanical expressions are obtained for the steady-state response to the harmonic mechanical excitation in the flexoelectric cantilever beams. The results show that the voltage output, power density, and mechanical vibration response exhibit significant scale effects at the nanoscale. Especially, the output power density for energy harvesting has an optimal value at an intrinsic length scale. This intrinsic length is proportional to the material flexoelectric coefficient. Moreover, it is found that the optimal load resistance for peak power density depends on the beam thickness at the small scale with a critical thickness. Our research indicates that flexoelectric energy harvesting could be a valid alternative to piezoelectric energy harvesting at micro- or nanoscales.

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Section: Voltage Frfsmentioning

confidence: 99%

Analytical Electromechanical Modeling of Nanoscale Flexoelectric Energy Harvesting

Lin

Huang

et al. 2019

Applied Sciences

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“…The field of energy harvesting is of great interest for researchers with applications in aerospace industry [ 3 ]. There are many mechanisms for energy transformation i.e., electromagnetic [ 4 ], electromechanical [ 5 , 6 ], and fluid-structure interaction systems [ 7 ]. Among these mechanisms, fluid-structure interaction (FSI) systems play a vital role because of its voltage-dependent actuation [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Piezoelectric Energy Harvester Based on Flag-Flutter

et al. 2020

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In the last few decades, piezoelectric (PZT) materials have played a vital role in the aerospace industry because of their energy harvesting capability. PZT energy harvesters (PEH) absorb the energy from an operational environment and can transform it into useful energy to drive nano/micro-electronic components. In this research work, a PEH based on the flag-flutter mechanism is presented. This mechanism is based on fluid-structure interaction (FSI). The flag is subjected to the axial airflow in the subsonic wind tunnel. The performance evaluation of the harvester and aeroelastic analysis is investigated numerically and experimentally. A novel solution is presented to extract energy from Limit Cycle Oscillations (LCOs) phenomenon by means of PZT transduction. The PZT patch absorbs the flow-induced structural vibrations and transforms it into electrical energy. Furthermore, the optimal resistance and length of the flag is predicted to maximize the energy harvesting. Different configurations of flag i.e., with Aluminium (Al) patch and PZT patch for flutter mode vibration mode are studied numerically and experimentally. The bifurcation diagram is constructed for the experimental campaign for the flutter instability of a cantilevered flag in subsonic wind-tunnel. Moreover, the flutter boundary conditions are analysed for reduced critical velocity and frequency. The designed PZT energy harvester via flag-flutter mechanism is suitable for energy harvesting in aerospace engineering applications to drive wireless sensors. The maximum output power that can be generated from the designed harvester is 6.72 mW and the optimal resistance is predicted to be 0.33 MΩ.

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“…Therefore, the intelligent monitoring of train systems requires the development of an environmentally friendly and semi-permanent “energy harvesting” technology exploiting the ambient energy generated during system operations [ 20 , 22 , 23 , 24 , 25 ]. The energy harvesting device’s research using electromagnetic induction should analyze the mechanical motion [ 22 , 26 , 27 , 28 , 29 ]. The mechanical motion characteristics can be classified into vibration and rotational motion [ 16 , 23 , 24 , 25 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Improvement of the Durability of an Energy Harvesting Device with a Mechanical Stopper and a Performance Evaluation for Its Application in Trains

Kim

2020

Micromachines

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Durability is one of the critical issues concerning energy harvesting devices. Even with the energy harvesting device’s excellent performance design, the moving components, such as the spring, get damaged during operation. In this study, an energy harvesting device was designed for durability improvement. The mechanical stopper of the energy harvesting device was selected as a new design component to prevent spring damage. An experimental and finite element analysis (FEA) was carried out on the amount of energy harvesting power possible using a mechanical stopper to improve the durability of the energy harvesting device. A performance evaluation of the energy harvesting device using the mechanical stopper was conducted under laboratory and driving conditions of a high-speed train traveling at 300 km/h. The measurement of the generated power gives the target value for the minimum performance of the newly designed energy harvesting device used as the power source of the wireless sensor node for high-speed trains.

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Design of a nonlinear energy harvester based on high static low dynamic stiffness for low frequency random vibrations

Cited by 45 publications

References 40 publications

Analytical Electromechanical Modeling of Nanoscale Flexoelectric Energy Harvesting

Analytical Electromechanical Modeling of Nanoscale Flexoelectric Energy Harvesting

Performance Evaluation of a Piezoelectric Energy Harvester Based on Flag-Flutter

A Study on the Improvement of the Durability of an Energy Harvesting Device with a Mechanical Stopper and a Performance Evaluation for Its Application in Trains

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