Differential measurements using two laser rotational vibrometers dynamic backlash.pdf (378.3 kB)

Differential measurements using two Laser Rotational Vibrometers: dynamic backlash

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conference contribution
posted on 03.12.2015, 15:02 by Peter Martin, Steve Rothberg
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.

Funding

The authors would like to acknowledge the Engineering and Physical Sciences Research Council (EPSRC) for financial support.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

7th International Conference on Vibration Measurements by Laser Techniques Seventh International Conference on Vibration Measurements by Laser Techniques: Advances and Applications

Volume

6345

Pages

N3450 - N3450 (9)

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.

Publisher

© Society of Photo-Optical Instrumentation Engineers (SPIE)

Version

VoR (Version of Record)

Publication date

2006

Notes

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.

ISBN

081946421X

ISSN

0277-786X

Language

en

Editor(s)

Tomasini, E.P.

Location

Ancona, ITALY