Remain useful life forecasting for roller bearings using sparse auto-encoder

Abstract

Abstract A method based on sparse auto-encoder (SAE) in deep learning (DL) for roller bearings remain useful life (RUL) prediction is presented in this paper. Firstly, the roller bearings vibration signals were calculated by different time and frequency domain factors, in which reflect the vibration signals information well. Therefore, the time and frequency domain features were regarded as the input of SAE, then the SAE model in deep learning was used to extract the features through several hidden layers and the sigmoid function was selected as the output function for calculate the prediction value. Finally, compared with other different prediction methods, such as support vector machine (SVM), back propagation (BP) neural network and random forest (RF), the performance of SAE is better than that those models by using mean absolute error (MAE) and root mean square error (RMSE) these two indicators.