A practical guide to laser Doppler vibrometry measurements directly from rotating surfaces
conference contributionposted on 2016-06-28, 11:03 authored 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.
- Mechanical, Electrical and Manufacturing Engineering
Published inIMechE Vibrations in Rotating Machinery – VIRM11
CitationHALKON, 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
- AM (Accepted Manuscript)
Publisher statementThis 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/
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.