Performance comparisons of piezoelectric energy harvesters under different stochastic noises

Harvesting energy utilizing the electromechanical coupling mechanism of piezoelectric materials in a noise environment has become important for developing applicable micropower generators. Although a variety of configurations have been proposed to harvest ambient vibration energy driven by determini...

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Main Authors: Sha Zhou, Tianjun Yu
Format: Article
Language:English
Published: AIP Publishing LLC 2020-03-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5141478
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spelling doaj-ba4c3154bafd47d9bfc8b3758f570c5b2020-11-25T02:52:10ZengAIP Publishing LLCAIP Advances2158-32262020-03-01103035033035033-1410.1063/1.5141478Performance comparisons of piezoelectric energy harvesters under different stochastic noisesSha Zhou0Tianjun Yu1Department of Engineering Mechanics, Zhejiang University, Hangzhou 310027, ChinaKey Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education and School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, ChinaHarvesting energy utilizing the electromechanical coupling mechanism of piezoelectric materials in a noise environment has become important for developing applicable micropower generators. Although a variety of configurations have been proposed to harvest ambient vibration energy driven by deterministic excitations and the energy conversion efficiency of classical one degree of freedom piezoelectric energy harvesters with a purely resistive circuit has been analyzed systematically, crucial questions still remain on how to design system parameters to maximize the performance under different ambient noises. Here, combining the moment method of random processes theory and the energy balance equation, we explore the performance of piezoelectric energy harvesters with and without an inductor excited by Gaussian white noise, exponential correlation noise, and bounded noise, respectively. The exact closed-form expressions of the mean square voltage, averaged output power, and efficiency are presented, and the effects of dimensionless system parameters and noise parameters on the performance metrics are illustrated in detail. Monte Carlo simulations are performed to validate the analytical predictions. The expressions given in this paper are useful in comparing the two types of piezoelectric energy harvesters under different ambient excitations and provide a key to design optimized harvesters operating in a more suitable environment.http://dx.doi.org/10.1063/1.5141478
collection DOAJ
language English
format Article
sources DOAJ
author Sha Zhou
Tianjun Yu
spellingShingle Sha Zhou
Tianjun Yu
Performance comparisons of piezoelectric energy harvesters under different stochastic noises
AIP Advances
author_facet Sha Zhou
Tianjun Yu
author_sort Sha Zhou
title Performance comparisons of piezoelectric energy harvesters under different stochastic noises
title_short Performance comparisons of piezoelectric energy harvesters under different stochastic noises
title_full Performance comparisons of piezoelectric energy harvesters under different stochastic noises
title_fullStr Performance comparisons of piezoelectric energy harvesters under different stochastic noises
title_full_unstemmed Performance comparisons of piezoelectric energy harvesters under different stochastic noises
title_sort performance comparisons of piezoelectric energy harvesters under different stochastic noises
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2020-03-01
description Harvesting energy utilizing the electromechanical coupling mechanism of piezoelectric materials in a noise environment has become important for developing applicable micropower generators. Although a variety of configurations have been proposed to harvest ambient vibration energy driven by deterministic excitations and the energy conversion efficiency of classical one degree of freedom piezoelectric energy harvesters with a purely resistive circuit has been analyzed systematically, crucial questions still remain on how to design system parameters to maximize the performance under different ambient noises. Here, combining the moment method of random processes theory and the energy balance equation, we explore the performance of piezoelectric energy harvesters with and without an inductor excited by Gaussian white noise, exponential correlation noise, and bounded noise, respectively. The exact closed-form expressions of the mean square voltage, averaged output power, and efficiency are presented, and the effects of dimensionless system parameters and noise parameters on the performance metrics are illustrated in detail. Monte Carlo simulations are performed to validate the analytical predictions. The expressions given in this paper are useful in comparing the two types of piezoelectric energy harvesters under different ambient excitations and provide a key to design optimized harvesters operating in a more suitable environment.
url http://dx.doi.org/10.1063/1.5141478
work_keys_str_mv AT shazhou performancecomparisonsofpiezoelectricenergyharvestersunderdifferentstochasticnoises
AT tianjunyu performancecomparisonsofpiezoelectricenergyharvestersunderdifferentstochasticnoises
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