Page 5 - Vibrations 3
P. 5
Spectrum of the autocorrelation function
Definition of Cross-correlation function
() = ∫ () ( − )
In effect, comparing the signal () with ().
If there are common frequency components in both of
them then () will be finite.
A rotating machine with two
bearings, accelerometers attached
to both bearings (as seen on the
left).
You may want to see the vibrations
which are common to both bearings.
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