In response to the problem of difficulty in accurately detecting early degradation of wind turbine yaw bearings
a service status evaluation model based on composite multiscale symbolic attention entropy and trend constrained autoencoder was proposed. Firstly
multiscale degradation features were extracted from the original vibration signals of yaw bearings by the composite multiscale symbolic attention entropy method. Secondly
the trend constrained autoencoder was used to compress and reduce the dimensionality of multiscale degradation features
to construct a health index that can accurately reflect the service status of yaw bearings. Finally
yaw bearing performance degradation was evaluated using adaptive health threshold strategy based on Chebyshev's inequality. Results show that the proposed model can accurately track the operational state of yaw bearings
promptly capture the initial degradation moment
and provide an accurate assessment of the service status of yaw bearings.
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references
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Related Author
WANG Xiaolong
SHI Haichao
HE Yuling
Related Institution
Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure Prevention, North China Electric Power University