A method of broadening the bandwidth by tuning the proof mass in a piezoelectric energy harvesting cantilever

Moon, Kyuchang; Choe, Jungho; Kim, Hyun-Chang; Ahn, Dahoon; Jeong, Jaehwa

doi:10.1016/j.sna.2018.04.004

Cited by 33 publications

(21 citation statements)

References 22 publications

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“…There are other recent research works which handle broadening the piezoelectric energy harvester bandwidth, such as acquiring the bandwidth broadening by tuning the harvester proof mass [ 22 ]. Broadband energy harvesting is achieved by integrating the piezoelectric patches with a thermally induced bistable plate.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

et al. 2021

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One of the most important challenges in the design of the piezoelectric energy harvester is its narrow bandwidth. Most of the input vibration sources are exposed to frequency variation during their operation. The piezoelectric energy harvester’s narrow bandwidth makes it difficult for the harvester to track the variations of the input vibration source frequency. Thus, the harvester’s output power and overall performance is expected to decline from the designed value. This current study aims to solve the problem of the piezoelectric energy harvester’s narrow bandwidth. The main objective is to achieve bandwidth broadening which is carried out by segmenting the piezoelectric material of the energy harvester into n segments; where n could be more than one. Three arrays with two, four, and six beams are shaped with two piezoelectric segments. The effect of changing the length of the piezoelectric material segment on the resonant frequency, output power, and bandwidth, as well as the frequency response is investigated. The proposed piezoelectric energy harvesters were implemented utilizing a finite element method (FEM) simulation in a MATLAB environment. The results show that increasing the number of array beams increases the output power and bandwidth. For the three-beam arrays, at n equals 2, 6 mW output power and a 9 Hz bandwidth were obtained. Moreover, the bandwidth of such arrays covered around 5% deviation from its resonant frequency. All structures were designed to operate as a steel wheel safety sensor which could be used in train tracks.

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Section: Introductionmentioning

confidence: 99%

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

et al. 2021

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“…Wherein, a commonly used method is tuning the structural frequency to match the resonant vibration frequency, yielding severer response and consequent higher power [43][44][45]. Moon et al [46] tested the cantilever beam with a tuned proof mass and observed a 426.6% increase in bandwidth at the same output level and 508.5% growth in power as compared to the conventional form. Apart from the mass, the geometry of the cantilever plays an important role in tuning the resonant frequency.…”

Section: Introductionmentioning

confidence: 99%

The State‐of‐the‐Art Brief Review on Piezoelectric Energy Harvesting from Flow‐Induced Vibration

Zhu

Tang

Yang

et al. 2021

Shock and Vibration

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Flow-induced vibration (FIV) is concerned in a broad range of engineering applications due to its resultant fatigue damage to structures. Nevertheless, such fluid-structure coupling process continuously extracts the kinetic energy from ambient fluid flow, presenting the conversion potential from the mechanical energy to electricity. As the air and water flows are widely encountered in nature, piezoelectric energy harvesters show the advantages in small-scale utilization and self-powered instruments. This paper briefly reviewed the way of energy collection by piezoelectric energy harvesters and the various measures proposed in the literature, which enhance the structural vibration response and hence improve the energy harvesting efficiency. Methods such as irregularity and alteration of cross-section of bluff body, utilization of wake flow and interference, modification and rearrangement of cantilever beams, and introduction of magnetic force are discussed. Finally, some open questions and suggestions are proposed for the future investigation of such renewable energy harvesting mode.

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“…There are many publications on tuning the vibration characteristics of an energy harvester by adjusting the excitation frequency. These include tuning an added mass (Jiang et al, 2005; Moon et al, 2018), mechanical preloads (Hu et al, 2007b), and varying the geometrical parameters of the structure (Hu et al, 2007a). For all of these studies, the excitation frequency is supposed to be close to the resonance frequency.…”

Section: Introductionmentioning

confidence: 99%

Broadband energy harvesting from time-delayed nonlinear oscillations of magnetic levitation

Firoozy

Ebrahimi-Nejad

2020

Journal of Intelligent Material Systems and Structures

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This article investigates quasiperiodic energy harvesting in a nonlinear vibration-based harvester, consisting of delayed nonlinear vibrations from magnetic levitation subjected to harmonic base acceleration, in which time-delay is introduced. For energy harvesting, a coil made up of seven layers of 36 gauges wound around the outer casing is utilized. The first- and second-order perturbation approximations are used to obtain the frequency responses of the power and vibration amplitudes in the vicinity of primary resonance. Numerical results are presented to verify the correctness of the analytical solutions. The results show that there is a good agreement between the second approximation and the numerical method; thus, we used the second-order perturbation to present the results. The impact of several parameters on the power and vibration amplitudes in the absence and presence of delay is studied. It was observed that using the nonlinear vibrations due to magnetic levitation in the absence and presence of the delay enables energy harvesting over broadband frequencies distant from primary resonance, which benefits preventing the instability and hysteresis regions near resonance. Dynamic behaviors of the motion are shown in the form of time histories and phase portraits. The results indicate periodic and quasiperiodic motions for the different values of the delay parameters. Also, the effects of the separation distance between magnets [Formula: see text], without and with time-delay, on the vibration and power amplitudes were examined. It was observed that the [Formula: see text], for both points chosen from stable periodic solution and unstable periodic solution, has a significant influence on the system behavior. Thus, choosing proper values for these parameters enables the device to extract more power in lower and broadband excitation frequencies. Besides, we illustrate that for specific values of [Formula: see text] and delay time parameters, the maximum system power output is not necessarily accompanied by maximum vibration amplitude.

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A method of broadening the bandwidth by tuning the proof mass in a piezoelectric energy harvesting cantilever

Cited by 33 publications

References 22 publications

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

Bandwidth Broadening of Piezoelectric Energy Harvesters Using Arrays of a Proposed Piezoelectric Cantilever Structure

The State‐of‐the‐Art Brief Review on Piezoelectric Energy Harvesting from Flow‐Induced Vibration

Broadband energy harvesting from time-delayed nonlinear oscillations of magnetic levitation

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