Determination of blade vibration frequencies and/or amplitudes
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United States of America Patent
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Feb 19, 2013
Grant Date -
Jul 15, 2010
app pub date -
Nov 25, 2009
filing date -
Jan 9, 2009
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Abstract
A method is provided for determining vibration frequencies of rotating blades mounted on a rotor which rotates relative to and is supported by a rotor support structure. The method includes the steps of:
- (a) determining possible vibration frequencies of the blade from blade displacements corresponding to the times at which a blade passes a stationary timing probe;(b) converting a vibration signal detectable at the support structure into a vibration frequency spectrum; and(c) identifying the blade vibration frequency by matching a peak in the vibration frequency spectrum with one of the possible blade vibration frequencies.
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