Share Email Print
cover

Proceedings Paper

Measurement of translational and angular vibration using a scanning laser Doppler vibrometer
Author(s): Anthony B. Stanbridge; David J. Ewins
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

An experimental procedure for measuring angular rotation vibration as well as translation, using a continuously-scanning Laser Doppler Vibrometer, is described. Sinusoidal scanning enables one angular vibration component to be measured but, by circular scanning, two principal angular vibrations and their direction can be derived directly from the frequency response sidebands. Examples of sine excitation measurements on a rigid cube are given. Processes of narrow-band random excitation and modal analysis are illustrated with reference to measurements on a freely-suspended beam. The laser beam was scanned by using x-y axis deflection mirrors; if this facility was not available, circular scanning could probably be achieved by using a rotating tilted mirror. Sideband frequency response references were obtained by using multiplied excitation force and mirror-drive signals.

Paper Details

Date Published: 8 September 1994
PDF: 11 pages
Proc. SPIE 2358, First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (8 September 1994); doi: 10.1117/12.185354
Show Author Affiliations
Anthony B. Stanbridge, Imperial College of Science, Technology and Medicine (United Kingdom)
David J. Ewins, Imperial College of Science, Technology and Medicine (United Kingdom)


Published in SPIE Proceedings Vol. 2358:
First International Conference on Vibration Measurements by Laser Techniques: Advances and Applications
Enrico Primo Tomasini, Editor(s)

© SPIE. Terms of Use
Back to Top