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Title: Differential measurements using two Laser Rotational Vibrometers: dynamic backlash
Authors: Martin, Peter
Rothberg, Steve
Editors: Tomasini, E.P.
Keywords: Laser rotational vibrometer
Vibrometry
Differential measurement
Dynamic backlash
Speckle noise
Issue Date: 2006
Publisher: © Society of Photo-Optical Instrumentation Engineers (SPIE)
Citation: MARTIN, P. and ROTHBERG, S., 2006. Differential measurements using two Laser Rotational Vibrometers: dynamic backlash. IN: Proceedings of SPIE, vol 6345, Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 21st June 2006, Ancona, Italy, pp. 63450N-1 - 63450N-9.
Abstract: The Laser Rotational Vibrometer is well suited to non-contact measurement of angular vibration on rotating targets, particularly by virtue of inherent insensitivity to target shape and translational motion. A differential measurement is proposed using two Vibrometers to allow a calculation of dynamic backlash between spur gears from relative tangential displacements. It is known that target motions, such as rotation, produce changes in the speckle pattern on the photodetector which add noise to the Vibrometer output. The significance of noise is always increased when differential measurements are required. The noise produced by the speckle pattern is apparent but the data reveals that it is possible to make the dynamic backlash measurement in this way. The dynamic backlash measurement is verified against equivalent high speed video footage, confirming the suitability of Laser Vibrometry in this application.
Description: Copyright 2006 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Sponsor: The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for financial support.
Version: Published
DOI: 10.1117/12.693072
URI: https://dspace.lboro.ac.uk/2134/19726
Publisher Link: http://dx.doi.org/10.1117/12.693072
ISBN: 081946421X
ISSN: 0277-786X
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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