Use of continuous scanning LDV for diagnostics

Dario Di Maio*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

2 Citations (Scopus)

Abstract

Nowadays, diagnostic is an important assessment of integrity of structural components. Amongst the technologies capable of monitoring structural integrity the continuous scanning (CS) measurement method can be a valid alternative in quasi real-time acquisition methods. Its major feature is the capacity of continuously recording vibration response by sweeping a laser beam over a surface. The LDV output signal will be amplitude modulated because of the periodicity of the scanning for a given vibration oscillation. The spectral content of the LDV output signal is made of sidebands, which can be used for representing an Operational Deflection Shape of the structure. This paper proposes a numerical study focused on the changes of the spectral signature of the sidebands when a damage occurs in a structure. The major objective is to map these changes against an undamaged spectral signature and evaluate if this approach can be used for diagnostic purposes.

Original languageEnglish
Title of host publicationRotating Machinery, Hybrid Test Methods, Vibro-Acoustics
Subtitle of host publicationProceedings of the 34th IMAC, A Conference and Exposition on Structural Dynamics 2016
EditorsJames De Clerck, David S. Epp
Place of PublicationCham
PublisherSpringer
Pages127-137
Number of pages11
Volume8
ISBN (Electronic)978-3-319-30084-9
ISBN (Print)978-3-319-30083-2
DOIs
Publication statusPublished - 2016
Externally publishedYes
Event34th Conference and Exposition on Structural Dynamics, IMAC 2016 - Orlando, United States
Duration: 25 Jan 201628 Jan 2016
Conference number: 34

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer
Volume8
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Conference

Conference34th Conference and Exposition on Structural Dynamics, IMAC 2016
Abbreviated titleIMAC
CountryUnited States
CityOrlando
Period25/01/1628/01/16

Keywords

  • Continuous scanning
  • Damage
  • Diagnostics
  • ODS
  • Real-time

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