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Performance enhancement of snap-through vibration energy harvester with displacement amplifier.

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Title: Performance enhancement of snap-through vibration energy harvester with displacement amplifier.
Authors: Devarajan, K.1 (AUTHOR), Santhosh, B.1 (AUTHOR) b_santhosh@cb.amrita.edu
Source: International Journal of Mechanical Sciences. Sep2023, Vol. 253, pN.PAG-N.PAG. 1p.
Subjects: White noise, Probability density function, Energy harvesting, Reduced-order models, Random noise theory, Pseudopotential method
Abstract: Vibration energy harvesters (VEH) based on bistable and snap-through mechanisms are being widely employed to harvest energy from different vibration sources. However, under weak ambient excitation, the performance of these systems is marginal. Multi-stability and enhancement techniques, such as displacement amplifier, are being used with bistable VEH to improve its performance. Similar to this, multi-stable snap-through VEH has also been developed; however, the usage of a displacement amplifier in the context of snap-through VEH has not yet been investigated. In this novel study, a displacement amplifier/ displacement amplification mechanism (DAM) is integrated into a snap-through VEH, and the enhanced performance under weak excitation is investigated. A generalized transformation is applied to develop a reduced-order model of the proposed system, and its dynamics and performance under harmonic and random excitation are investigated analytically and numerically. The frequency–amplitude relationship is derived under harmonic excitation, and a detailed investigation of the influence of system parameters on the frequency and force responses is performed. It is observed that by adjusting the mass and stiffness ratio between the VEH and DAM, it is possible to harvest more energy under harmonic excitation of low intensity. In the case of Gaussian white noise excitation, effective potential, and stochastic averaging methods are used to obtain marginal, joint, and stationary probability density functions and mean square power. The influence of noise intensity and other system parameters on the aforementioned measures is thoroughly investigated. It is observed that for specific parameter values, the proposed VEH can harvest 3.3 times more power under harmonic excitation and four times more power under random excitation compared to the snap-through VEH without DAM. [Display omitted] • Integration of DAM to snap-through VEH exhibits enhanced performance under weak excitation. • Performance of the VEH is investigated under harmonic and random excitations. • Power output improves by 3.3 times under harmonic and four times under random excitation. • This simple snap-through VEH enhancement avoids the complicated design of multistable VEH. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Mechanical Sciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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PubType: Academic Journal
PubTypeId: academicJournal
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IllustrationInfo
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  Data: Performance enhancement of snap-through vibration energy harvester with displacement amplifier.
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  Data: <searchLink fieldCode="AR" term="%22Devarajan%2C+K%2E%22">Devarajan, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Santhosh%2C+B%2E%22">Santhosh, B.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> b_santhosh@cb.amrita.edu</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Mechanical+Sciences%22">International Journal of Mechanical Sciences</searchLink>. Sep2023, Vol. 253, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22White+noise%22">White noise</searchLink><br /><searchLink fieldCode="DE" term="%22Probability+density+function%22">Probability density function</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+harvesting%22">Energy harvesting</searchLink><br /><searchLink fieldCode="DE" term="%22Reduced-order+models%22">Reduced-order models</searchLink><br /><searchLink fieldCode="DE" term="%22Random+noise+theory%22">Random noise theory</searchLink><br /><searchLink fieldCode="DE" term="%22Pseudopotential+method%22">Pseudopotential method</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Vibration energy harvesters (VEH) based on bistable and snap-through mechanisms are being widely employed to harvest energy from different vibration sources. However, under weak ambient excitation, the performance of these systems is marginal. Multi-stability and enhancement techniques, such as displacement amplifier, are being used with bistable VEH to improve its performance. Similar to this, multi-stable snap-through VEH has also been developed; however, the usage of a displacement amplifier in the context of snap-through VEH has not yet been investigated. In this novel study, a displacement amplifier/ displacement amplification mechanism (DAM) is integrated into a snap-through VEH, and the enhanced performance under weak excitation is investigated. A generalized transformation is applied to develop a reduced-order model of the proposed system, and its dynamics and performance under harmonic and random excitation are investigated analytically and numerically. The frequency–amplitude relationship is derived under harmonic excitation, and a detailed investigation of the influence of system parameters on the frequency and force responses is performed. It is observed that by adjusting the mass and stiffness ratio between the VEH and DAM, it is possible to harvest more energy under harmonic excitation of low intensity. In the case of Gaussian white noise excitation, effective potential, and stochastic averaging methods are used to obtain marginal, joint, and stationary probability density functions and mean square power. The influence of noise intensity and other system parameters on the aforementioned measures is thoroughly investigated. It is observed that for specific parameter values, the proposed VEH can harvest 3.3 times more power under harmonic excitation and four times more power under random excitation compared to the snap-through VEH without DAM. [Display omitted] • Integration of DAM to snap-through VEH exhibits enhanced performance under weak excitation. • Performance of the VEH is investigated under harmonic and random excitations. • Power output improves by 3.3 times under harmonic and four times under random excitation. • This simple snap-through VEH enhancement avoids the complicated design of multistable VEH. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Mechanical Sciences is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.ijmecsci.2023.108391
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: White noise
        Type: general
      – SubjectFull: Probability density function
        Type: general
      – SubjectFull: Energy harvesting
        Type: general
      – SubjectFull: Reduced-order models
        Type: general
      – SubjectFull: Random noise theory
        Type: general
      – SubjectFull: Pseudopotential method
        Type: general
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      – TitleFull: Performance enhancement of snap-through vibration energy harvester with displacement amplifier.
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            NameFull: Devarajan, K.
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            NameFull: Santhosh, B.
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            – D: 01
              M: 09
              Text: Sep2023
              Type: published
              Y: 2023
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              Value: 253
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