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A wavelet packet spectral subtraction and convolutional neural network based method for diagnosis of system health

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Health monitoring systems play a key role inside smart factories. To enhance the real-time capability and reliability of health monitoring systems, we propose a fully automatic method for machine diagnosis.… Click to show full abstract

Health monitoring systems play a key role inside smart factories. To enhance the real-time capability and reliability of health monitoring systems, we propose a fully automatic method for machine diagnosis. Firstly, acquired vibration signals are converted into high-resolution images by wavelet packet spectral subtraction. Next, a trained convolutional neural network (CNN) automatically extracts important features and determines the current health of the machine. The performance of the proposed method is demonstrated by employing a diagnosis problem of a bearing system. The result shows an outstanding classification accuracy of 99.64 % even with a small amount of training data (5 % of the data).

Keywords: packet spectral; diagnosis; spectral subtraction; method; health; wavelet packet

Journal Title: Journal of Mechanical Science and Technology
Year Published: 2019

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