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A practical guide to laser Doppler vibrometry measurements directly from rotating surfaces

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conference contribution
posted on 28.06.2016 by Ben Halkon, Steve Rothberg
Commercially available Laser Doppler vibrometers are typically configured with a single beam to measure radial and axial vibrations or with parallel beams to measure pitch, yaw and torsional vibrations. Provided sufficient light intensity can be collected, axial and torsional vibration measurements are relatively straightforward. Radial and pitch / yaw vibration measurements are less straightforward and rotor surface roughness or treatment is critically important. Unless rotor surfaces can be considered “polished-circular”, post-processing is necessary to remove a significant cross-sensitivity to motion orthogonal to that which it is intended to measure. This paper serves as a practical guide through the optimum configurations to be used on rotors to measure all components of vibration, including subtleties associated with beam diameter and vibration amplitude on polished rotors.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

IMechE Vibrations in Rotating Machinery – VIRM11

Citation

HALKON, B.J. and ROTHBERG, S., 2016. A practical guide to laser Doppler vibrometry measurements directly from rotating surfaces. Presented at the IMechE Vibrations in Rotating Machinery (VIRM11), Manchester, 13-15th September.

Publisher

© The Authors. Published by the Institution of Mechanical Engineers

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

16/06/2016

Publication date

2016

Notes

© Ben Halkon and Steve Rothberg 2015 . The definitive version of this article is published in IMechE Vibrations in Rotating Machinery (VIRM11)Institution of Mechanical Engineers, 2015.

Language

en

Location

University Place, University of Manchester, Manchester

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