Radial vibration measurements on rotors using laser vibrometry: a first practical solution to the cross-sensitivity problem

John Bell; Steve J. Rothberg

doi:10.1117/12.307692

1 June 1998 Radial vibration measurements on rotors using laser vibrometry: a first practical solution to the cross-sensitivity problem

John Bell, Steve J. Rothberg

Author Affiliations +

Proceedings Volume 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications; (1998) https://doi.org/10.1117/12.307692
Event: Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, 1998, Ancona, Italy

Abstract

Rotor vibration measurement is a key part of both the development and condition monitoring of rotating machinery. Measurement of the vibration transmitted from the rotor into a non-rotating component is the most common arrangement but in many situations the ideal rotor vibration measurement would be one taken directly from the rotating component. The non-contact nature of laser vibrometers are sensitive to motion perpendicular to the intended measurement and speed fluctuations. This paper presents a technique that enables accurate steady-state, non-synchronous vibration measurements to be made. Measurements on a test rotor have been compared with bearing mounted accelerometer measurements to validate the technique and sensitivity to inaccuracy in the measurement of rotation speed has been quantified.

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John Bell and Steve J. Rothberg "Radial vibration measurements on rotors using laser vibrometry: a first practical solution to the cross-sensitivity problem", Proc. SPIE 3411, Third International Conference on Vibration Measurements by Laser Techniques: Advances and Applications, (1 June 1998); https://doi.org/10.1117/12.307692

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