ROTHBERG, S., 2003. Laser rotational vibrometers and their application in modal analysis. IN: Proceedings of the 21st IMAC Conference and Exposition 2003 (IMAC XXI): a Conference and Exposition on Structural Dynamics, 3rd-6th February 2003, Kissimmee, Florida, USA. Curran Associates, volume 2, pp. 672-681.
Many vibration engineers are now familiar with single
beam Laser Vibrometers which are suitable for
translational vibration measurements but fewer are
familiar with Laser Vibrometers with a pair of parallel
probe beams which are used for rotational vibration
measurements. This paper explains why the parallel
beam configuration is so effective, comparing this with
early uses of cross-beam arrangements and concluding
with an application of these so-called ‘Rotational
Vibrometers’ in the evaluation of a torsional absorber
using modal analysis.
This conference paper is available here with the kind permission of the Society for Experimental Mechanics.
The author acknowledges the contribution of the
Engineering and Physical Sciences Research Council
who funded and are continuing to fund the work on
vibration measurements directly from rotors.