base motion subtraction paper new 3-11-16 accepted.pdf (1.7 MB)
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Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration

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journal contribution
posted on 16.11.2016, 13:38 by Ben Halkon, Steve RothbergSteve Rothberg
Laser Doppler vibrometers (LDVs) are now well-established as an effective non-contact alternative to traditional contacting transducers. Despite 30 years of successful applications, however, very little attention has been given to sensitivity to vibration of the instrument itself. In this paper, the sensitivity to instrument vibration is confirmed before development theoretically and experimentally of a practical scheme to enable correction of measurements for arbitrary instrument vibration. The scheme requires a pair of correction sensors with appropriate orientation and relative location, while using frequency domain processing to accommodate inter-channel time delay and signal integrations. Error reductions in excess of 30 dB are delivered in laboratory tests with simultaneous instrument and target vibration over a broad frequency range. Ultimately, application to measurement on a vehicle simulator experiencing high levels of vibration demonstrates the practical nature of the correction technique and its robustness in a challenging measurement environment.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Optics and Lasers in Engineering

Volume

91

Pages

16 - 23

Citation

HALKON, B.J. and ROTHBERG, S., 2017. Taking laser Doppler vibrometry off the tripod: correction of measurements affected by instrument vibration. Optics and Lasers in Engineering, 91, pp. 16-23.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

03/11/2016

Publication date

2016-11-16

Notes

This paper was accepted for publication in the journal Optics and Lasers in Engineering and the definitive published version is available at http://dx.doi.org/10.1016/j.optlaseng.2016.11.006.

ISSN

0143-8166

Language

en