Aiming at the issue that conventional multi-scale convolutional neural networks in bearing fault diagnosis simply spliced features of different scales without considering the feature differences of different scales
a multi-scale adaptive selective convolutional neural network(MSASCNN)bearing fault diagnosis model is proposed. The features of the original bearing vibration signals are selected in the model through wide convolution of different sizes and combined into initial features. Multi-scale adaptive selective convolutional blocks are constructed to extract features of different scales
and the improved attention mechanism is used to adjust the feature weights of different scales adaptively
and residual connections are added to prevent model degradation. The bearing fault diagnosis is completed by the classifier. The experimental results on Case Western Reserve University bearing dataset and XJTU-SY bearing dataset show that in the model improving experiment
the bearing fault diagnosis accuracy of the proposed model increases by 1.98% compared with the model without improved attention mechanism. In the noise interference environment with different signal-to-noise ratios
the bearing fault diagnosis accuracy of the proposed model is higher than 93%.
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references
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