The integration of a laser Doppler vibrometer with computer controlled scanning mirrors provides a versatile system for vibration measurement. Such an instrument has been developed at Rolls-Royce, with the objective of using it for vibration measurement in both the laboratory and in a hostile environment such as an engine test cell. This paper describes this system together with a number of examples of its application to vibration testing in aero-engine development.
Get full access to this article
View all access options for this article.
References
1.
MasseyG. A.CarterR. R.Portable laser instrument for vibration analysis and transducer calibration. Shock and Vibr. Bull., 1968, 37(2).
2.
HalliwellN. A.Laser Doppler measurement of vibrating surfaces: a portable instrument. J. Sound and Vibr., 1979, 62 (2), 312–315.
3.
WinneyP. E.Modal surveys of very large civil structures using remote measurement of response to naturally occurring excitation. SPIE Conference on Stress and vibration—recent developments in industrial measurement and analysis, London, 1989, SPIE Vol. 1084, pp. 186–194.
4.
StetsonK. A.Holographic vibration analysis. In Holographic nondestructive testing (Ed. ErfR. K.), 1974, Ch. 7 (Academic Press, New York).
5.
ErfR. K. (Ed.) Speckle metrology, 1978 (Academic Press, New York).
StoffregenB.FelskeA.Scanning laser Doppler vibration analysis system. Proc. SAE 850327, 1986.
8.
EwinsD. J.Modal testing: theory and practice, 1984 (John Wiley, Chichester).
9.
SwiftD. W.Image rotation devices—a comparative survey. Optics and Laser Technology, August 1972.
10.
ParkerR. J.JonesD. G.The use of holographic interferometry for turbomachinery fan evaluation during rotating tests. J. Turbomachinery, 1988, 110, 393–400.
