Method and apparatus for vibration-based automatic condition monitoring of a wind turbine
First Claim
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1. A method for vibration-based automatic condition monitoring of a wind turbine, comprising:
- determining a set of vibration measurement values of the wind turbine;
calculating a frequency spectrum of the set of vibration measurement values;
calculating a cepstrum of the frequency spectrum;
selecting at least one first quefrency in the cepstrum; and
detecting an alarm condition based upon an amplitude of the cepstrum at the selected quefrency.
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Abstract
Method and apparatus for vibration-based automatic condition monitoring of a wind turbine, comprising the steps of: determining a set of vibration measurement values of the wind turbine; calculating a frequency spectrum of the set of vibration measurement values; calculating a cepstrum of the frequency spectrum; selecting at least one quefrency in the cepstrum, and detecting an alarm condition based upon an amplitude of the cepstrum at the selected quefrency, and a wind turbine therefor.
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Citations
20 Claims
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1. A method for vibration-based automatic condition monitoring of a wind turbine, comprising:
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determining a set of vibration measurement values of the wind turbine; calculating a frequency spectrum of the set of vibration measurement values; calculating a cepstrum of the frequency spectrum; selecting at least one first quefrency in the cepstrum; and detecting an alarm condition based upon an amplitude of the cepstrum at the selected quefrency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A monitoring apparatus for vibration-based automatic condition monitoring of a wind turbine, comprising:
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a processing unit configured to obtain a set of vibration measurement values of the wind turbine calculate a frequency spectrum of the set of vibration measurement values, and calculate a cepstrum of the frequency spectrum; and an alarm condition evaluator configured to select at least one first quefrency in the cepstrum and to detect an alarm condition based upon an amplitude of the cepstrum at the selected quefrency. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification