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  • Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers

    Rights statement: The final, definitive version of this article has been published in the Journal, Journal of Intelligent Material Systems and Structures, ? (?), 2022, © SAGE Publications Ltd, 2022 by SAGE Publications Ltd at the Journal of Intelligent Material Systems and Structures page: https://journals.sagepub.com/home/jim on SAGE Journals Online: http://journals.sagepub.com/

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Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers

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Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers. / Daraji, Ali H; Ye, Jianqiao; Hale, Jack M.

In: Journal of Intelligent Material Systems and Structures, 15.07.2022.

Research output: Contribution to Journal/MagazineJournal articlepeer-review

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Daraji AH, Ye J, Hale JM. Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers. Journal of Intelligent Material Systems and Structures. 2022 Jul 15. Epub 2022 Jul 15. doi: 10.1177/1045389x221111534

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Daraji, Ali H ; Ye, Jianqiao ; Hale, Jack M. / Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers. In: Journal of Intelligent Material Systems and Structures. 2022.

Bibtex

@article{5a8921c08f054439b01ae3910fc45dc5,
title = "Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers",
abstract = "This paper concerns optimal placement and number of discrete piezoelectric macro fibre composite (MFC) sensors to optimise SHM systems. Its novelty lies in a two-stage placement methodology for discrete piezoelectric transducers, with fitness and objective functions to optimise the location and number of discrete piezoelectric sensors in order to reduce the cost and complexity of data processing and increase the effectiveness in damage detection. The maximisation of sensor voltage amplitude at multiple modes of vibration and the average of sensor normal damage index [Formula: see text] measured for several plates artificially cracked at different positions and orientations are proposed as objective functions to optimise the locations and the number of efficient piezoelectric sensors. A non-normalised root-mean-square deviation [Formula: see text] is introduced in this study in place of the conventional normalised [Formula: see text] to assess the degree of damage and sensor effectiveness. Furthermore, normal damage indices [Formula: see text] and [Formula: see text] normalised to 100% are proposed as the fitness functions. The placement methodology is utilised and verified for stiffened and unstiffened plates; stiffeners are used to break the dynamic symmetry and increase plate complexity. The performance of the placement methodology is tested for a healthy and 12 damaged plates to optimise SHM system based on the maximisation of sensor voltage and average normal damage index [Formula: see text] as objective functions. The results show that the placement methodology is efficient in determining the optimum number and placement of piezoelectric sensors at a low computational effort. The optimum placement of two piezoelectric sensors can efficiently monitor the crack{\textquoteright}s initiation at different positions and multiple modes of vibration. The optimal placement and number of sensors have a positive impact on the cost, data acquisition and processing of the active SHM system",
keywords = "Piezoelectric, optimal placement, genetic algorithms, normal damage index, SHM",
author = "Daraji, {Ali H} and Jianqiao Ye and Hale, {Jack M}",
note = "The final, definitive version of this article has been published in the Journal, Journal of Intelligent Material Systems and Structures, ? (?), 2022, {\textcopyright} SAGE Publications Ltd, 2022 by SAGE Publications Ltd at the Journal of Intelligent Material Systems and Structures page: https://journals.sagepub.com/home/jim on SAGE Journals Online: http://journals.sagepub.com/ ",
year = "2022",
month = jul,
day = "15",
doi = "10.1177/1045389x221111534",
language = "English",
journal = "Journal of Intelligent Material Systems and Structures",
issn = "1045-389X",
publisher = "SAGE Publications Ltd",

}

RIS

TY - JOUR

T1 - Optimisation of active SHM system based on optimal number and placement of piezoelectric transducers

AU - Daraji, Ali H

AU - Ye, Jianqiao

AU - Hale, Jack M

N1 - The final, definitive version of this article has been published in the Journal, Journal of Intelligent Material Systems and Structures, ? (?), 2022, © SAGE Publications Ltd, 2022 by SAGE Publications Ltd at the Journal of Intelligent Material Systems and Structures page: https://journals.sagepub.com/home/jim on SAGE Journals Online: http://journals.sagepub.com/

PY - 2022/7/15

Y1 - 2022/7/15

N2 - This paper concerns optimal placement and number of discrete piezoelectric macro fibre composite (MFC) sensors to optimise SHM systems. Its novelty lies in a two-stage placement methodology for discrete piezoelectric transducers, with fitness and objective functions to optimise the location and number of discrete piezoelectric sensors in order to reduce the cost and complexity of data processing and increase the effectiveness in damage detection. The maximisation of sensor voltage amplitude at multiple modes of vibration and the average of sensor normal damage index [Formula: see text] measured for several plates artificially cracked at different positions and orientations are proposed as objective functions to optimise the locations and the number of efficient piezoelectric sensors. A non-normalised root-mean-square deviation [Formula: see text] is introduced in this study in place of the conventional normalised [Formula: see text] to assess the degree of damage and sensor effectiveness. Furthermore, normal damage indices [Formula: see text] and [Formula: see text] normalised to 100% are proposed as the fitness functions. The placement methodology is utilised and verified for stiffened and unstiffened plates; stiffeners are used to break the dynamic symmetry and increase plate complexity. The performance of the placement methodology is tested for a healthy and 12 damaged plates to optimise SHM system based on the maximisation of sensor voltage and average normal damage index [Formula: see text] as objective functions. The results show that the placement methodology is efficient in determining the optimum number and placement of piezoelectric sensors at a low computational effort. The optimum placement of two piezoelectric sensors can efficiently monitor the crack’s initiation at different positions and multiple modes of vibration. The optimal placement and number of sensors have a positive impact on the cost, data acquisition and processing of the active SHM system

AB - This paper concerns optimal placement and number of discrete piezoelectric macro fibre composite (MFC) sensors to optimise SHM systems. Its novelty lies in a two-stage placement methodology for discrete piezoelectric transducers, with fitness and objective functions to optimise the location and number of discrete piezoelectric sensors in order to reduce the cost and complexity of data processing and increase the effectiveness in damage detection. The maximisation of sensor voltage amplitude at multiple modes of vibration and the average of sensor normal damage index [Formula: see text] measured for several plates artificially cracked at different positions and orientations are proposed as objective functions to optimise the locations and the number of efficient piezoelectric sensors. A non-normalised root-mean-square deviation [Formula: see text] is introduced in this study in place of the conventional normalised [Formula: see text] to assess the degree of damage and sensor effectiveness. Furthermore, normal damage indices [Formula: see text] and [Formula: see text] normalised to 100% are proposed as the fitness functions. The placement methodology is utilised and verified for stiffened and unstiffened plates; stiffeners are used to break the dynamic symmetry and increase plate complexity. The performance of the placement methodology is tested for a healthy and 12 damaged plates to optimise SHM system based on the maximisation of sensor voltage and average normal damage index [Formula: see text] as objective functions. The results show that the placement methodology is efficient in determining the optimum number and placement of piezoelectric sensors at a low computational effort. The optimum placement of two piezoelectric sensors can efficiently monitor the crack’s initiation at different positions and multiple modes of vibration. The optimal placement and number of sensors have a positive impact on the cost, data acquisition and processing of the active SHM system

KW - Piezoelectric

KW - optimal placement

KW - genetic algorithms

KW - normal damage index

KW - SHM

U2 - 10.1177/1045389x221111534

DO - 10.1177/1045389x221111534

M3 - Journal article

JO - Journal of Intelligent Material Systems and Structures

JF - Journal of Intelligent Material Systems and Structures

SN - 1045-389X

ER -