Method for fault diagnosis of wind turbine bear
A wind turbine, fault diagnosis technology, applied in the direction of mechanical bearing testing, neural learning methods, special data processing applications, etc., can solve problems such as bearings that have not been processed, and achieve the effects of suppressing noise, improving signal-to-noise ratio, and high accuracy
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[0138] Example: Fault Diagnosis of Bearing Inner and Outer Rings of Wind Turbines
[0139] A set of known bearing data is used for fault diagnosis, where the input shaft frequency is 25Hz, the sampling rate is 48828sps, the roller diameter is 0.235mm, the pitch diameter is 1.245mm, the number of elements is 8, and the contact angle is 0. This paper selects six types of fault data, which are the fault data of the inner ring at 0 lb, 150 lb, and 300 lb load and the outer ring at 25 lb, 150 lb, and 300 lb load.
[0140] First, the six types of data are decomposed by the method described in the invention. After the decomposition, according to the calculated correlation coefficient between the PF component and the original signal, the first three layers are selected for index calculation, and 18 new sets of data samples are obtained.
[0141] Then, the number of samples of the inner circle data is 120000, and divided into 50 segments, each segment has 2400 points, forming X1 50×24...
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