Rolling Bearings Fault Diagnosis via 1D Convolution Networks

This paper proposes a convolution neural network based fault diagnosis for rolling bearings. Analysis about why convolution networks fit for vibration signals is first introduced. Then, an end to end network that reflects the raw vibration signals to fault types is built. Hyper parameters are tuned guided by the similarities and differences between images and vibration signals. Some conclusions about hyper parameters are drawn from hyper parameters tuning process, which helps us get a deeper understanding of convolution network's application to vibration signals. The experiment is taken using Case Western Reserve University bearings dataset and 101 categories including different motor speeds are divided from the raw data. The result shows that our model achieves about 99% accuracy. What's more, even the frequency differences among motor speeds are very small (about 20 RPM, less than 0.5 Hz), our model can also classify them with high accuracy.