Fault diagnosis of rotary machinery components using a stacked denoising autoencoder-based health state identification

Principle Component Analysis

https://escholarship.org/content/qt4999765n/qt4999765n.pdf?t=psy2c4

Multi-Layer domain adaptation method for rolling bearing fault diagnosis

Effective fault diagnosis of rotating machinery has always been an important issue in real industries. In the recent years, data-driven fault diagnosis methods such as neural networks have been receiving increasing attention due to their great merits of high diagnosis accuracy and easy implementation. However, it is mostly difficult to fully train a deep neural network since gradients in optimization may vanish or explode during back-propagation, which results in deterioration and noticeable variance in model performance. In fault diagnosis researches, larger data sequence of machinery vibration signal containing sufficient information is usually preferred and consequently, deep models with large capacity are generally adopted. In order to improve network training, a residual learning algorithm is proposed in this paper. The proposed architecture significantly improves the information flow throughout the network, which is well suited for processing machinery vibration signal with variable sequential length. Little prior expertise on fault diagnosis and signal processing is required, that facilitates industrial applications of the proposed method. Experiments on a popular rolling bearing dataset are implemented to validate the proposed method. The results of this study suggest that the proposed intelligent fault diagnosis method for rotating machinery offers a new and promising approach.

Deep residual learning-based fault diagnosis method for rotating machinery

Understanding and improving deep learning-based rolling bearing fault diagnosis with attention mechanism

Fault detection and diagnosis methods have to deal with large variable data sets encountered in complex industrial systems. Solutions to this problem require multivariate statistics approaches often focused on the reduction of the space dimension. In this paper we propose a fault detection and estimation approach using Multivariate Kullback-Leibler Divergence (MKLD) to cope with the negative effects due dimension reduction while using Principal Component Analysis (PCA). The obtained results show its superiority on the usual PCA-KLD based approach. An analytical model of the MKLD is proposed and validated for low severity fault (incipient fault) detection and estimation in noisy environment operating conditions.

Abdulrahman Youssef

Papers

Enhancement of incipient fault detection and estimation using the multivariate Kullback-Leibler Divergence