A linearized impact localization algorithm for the health monitoring of aerospace components

Mario Emanuele De Simone, Salvatore Boccardi, Francesco Ciampa, Michele Meo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Literature presents a wide range of techniques and algorithms for the localization of impact source in isotropic structures. However, many of these methods involve either solving complex systems of nonlinear equations or a-priori training of the monitored structure. This is not only time consuming, but it requires high levels of computational effort that may often result in a poor estimation of the impact coordinates. This paper presents a novel structural health monitoring system for the impact localization on aluminium components. The proposed methodology, in contrast to current impact localization techniques, relies on an optimal sensor placement, which allows reducing the nonlinear system of equations to a linearized and simplified form. Two different Akaike Information Criterion (AIC) pickers are used to calculate the arrival times of the direct elastic waves originated by the impact source. To validate this methodology, experimental tests were carried out on aerospace components using four surface-bonded piezoelectric sensors. The results showed that this technique allows detecting and localizing the impact source with a high level of accuracy in any point of the structure.

Original languageEnglish
Title of host publicationProceedings of 8th European Workshop on Structural Health Monitoring(EWSHM), 2016
Subtitle of host publicationVolume 3
PublisherNDT.net
Pages1773-1782
Number of pages10
ISBN (Electronic)9781510827936
Publication statusPublished - 2016
Event8th European Workshop on Structural Health Monitoring, EWSHM 2016 - Bilbao, Spain
Duration: 5 Jul 20168 Jul 2016

Conference

Conference8th European Workshop on Structural Health Monitoring, EWSHM 2016
CountrySpain
CityBilbao
Period5/07/168/07/16

Keywords

  • Acoustic emission
  • Guided wave propagation
  • Impact localization

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  • Cite this

    De Simone, M. E., Boccardi, S., Ciampa, F., & Meo, M. (2016). A linearized impact localization algorithm for the health monitoring of aerospace components. In Proceedings of 8th European Workshop on Structural Health Monitoring(EWSHM), 2016: Volume 3 (pp. 1773-1782). NDT.net.