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Fundamentals of Rotating Machinery Diagnostics

By
Donald E. Bently
Donald E. Bently
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Charles T. Hatch
Charles T. Hatch
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Bob Grissom
Bob Grissom
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ISBN:
9780971408104
No. of Pages:
756
Publisher:
ASME Press
Publication date:
2002

In the chapter on timebase plots, we saw how rotor dynamic motion along the measurement axis of a single transducer can be displayed as a time varying waveform. While the timebase plot can provide important and useful information, it is inherently limited to one dimension of rotor motion. Since, in any lateral plane along the rotor, the rotor moves in a two-dimensional path, or orbit, this one-dimensional picture provided by a single transducer is not adequate.

The Construction of the Orbit
The Keyphasor Mark
Compensation of Orbits
Information Contained in the Orbit
The Orbit/Timebase Plot
Summary
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