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Vibration measurements on rotating machinery using laser doppler velocimetry
journal contributionposted on 21.09.2011 by Steve Rothberg, Neil A. Halliwell
Any type of content formally published in an academic journal, usually following a peer-review process.
This paper explores the use of laser vibrometry for vibration measurement directly from a rotating component. The presence of a surface velocity component due to the rotation itself is shown to create a strong measurement dependency on vibration perpendicular to the intended measurement direction. Particular ambiguity results at synchronous frequencies. A mathematical means to resolve the genuine vibration components from two simultaneous laser vibrometer measurements is presented and shown to be effective in the study of nonsynchronous rotor vibrations.
- Mechanical, Electrical and Manufacturing Engineering