Development of a comprehensive mathematical model for simulating the effects of misalignments in vibration measurements using scanning LDV measurement systems

S. Di Battista*, D. Di Maio, D. J. Ewins, P. Castellini, E. P. Tomasini

*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

Scanning mirrors are very important contributors of a SLDV system. These mirrors are often installed inside the laser head thereby the optical access of the targeted structure must be always available during testing. However, some applications could benefit of having a laser head decoupled from the scanner so to positioning the twos in an optimum way, although this can introduce possible sources of misalignments. This paper presents the development of a mathematical model for simulating the effects of misalignment in vibration measurements using scanning LDV measurement systems. The misalignments between the laser source and the scanning unit, and between the latter and the target structure is a source of uncertainty, producing pseudo-vibrations and causing relative motion of the laser beam on the target surface. Using such a mathematical model, the effects of each parameter of misalignment can be simulated and studied. This work aims to presents simulations of all sources of misalignments when the scanners are decoupled from the laser head.

Original languageEnglish
Title of host publication9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course
Pages29-41
Number of pages13
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course 2010 - Ancona, Italy
Duration: 22 Jun 201025 Jun 2010
Conference number: 9

Publication series

NameAIP Conference Proceedings
Volume1253
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference9th International Conference on Vibration Measurements by Laser and Noncontact Techniques and Short Course 2010
CountryItaly
CityAncona
Period22/06/1025/06/10

Keywords

  • Continuous scanning
  • Laser doppler vibrometry
  • Misalignment
  • Scanning
  • Tracking

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