Fault Diagnosis of Bearings Based on Multi-Sensor Information Fusion and 2D Convolutional Neural Network

In complicated mechanical systems, fault diagnosis, especially regarding feature extraction from multiple sensors, remains a challenge. Most existing methods for feature extraction tend to assume that all sensors have uniform sampling rates. However, complex mechanical systems use multirate sensors. These methods use upsampling for data preprocessing to ensure that all signals at the same scale can cause certain time-frequency features to vanish. To address these issues, this paper proposes a Multirate Sensor Information Fusion Strategy (MRSIFS) for multitask fault diagnosis. The proposed method is based on multidimensional convolution blocks incorporating multisource information fusion into the convolutional neural network (CNN) architecture. Features with different sampling rates from the raw signals are run through a multichannel parallel fault feature extraction framework for fault diagnosis. Additionally, time-frequency analysis technology is used to reveal fault information in the association between time and frequency domains. The simulation platform’s experimental results show that the proposed multitask model achieves higher diagnosis accuracy than the existing methods. Furthermore, manual feature selection for each task becomes unnecessary in MRSIFS, which has the potential toward a general-purpose framework.

Download Full-text

Multitask Convolutional Neural Network With Information Fusion for Bearing Fault Diagnosis and Localization

IEEE Transactions on Industrial Electronics ◽

10.1109/tie.2019.2942548 ◽

2020 ◽

Vol 67 (9) ◽

pp. 8005-8015 ◽

Cited By ~ 8

Author(s):

Sheng Guo ◽

Bin Zhang ◽

Tao Yang ◽

Dongzhen Lyu ◽

Wei Gao

Keyword(s):

Neural Network ◽

Fault Diagnosis ◽

Convolutional Neural Network ◽

Information Fusion ◽

Bearing Fault ◽

Bearing Fault Diagnosis

Download Full-text

Fault Diagnosis for High-Speed Train Axle-Box Bearing Using Simplified Shallow Information Fusion Convolutional Neural Network

Sensors ◽

10.3390/s20174930 ◽

2020 ◽

Vol 20 (17) ◽

pp. 4930 ◽

Cited By ~ 1

Author(s):

Honglin Luo ◽

Lin Bo ◽

Chang Peng ◽

Dongming Hou

Keyword(s):

Neural Network ◽

Fault Diagnosis ◽

Convolutional Neural Network ◽

Information Fusion ◽

High Speed ◽

High Reliability ◽

Operating Conditions ◽

High Speed Train ◽

Bearing Fault ◽

Bearing Fault Diagnosis

Axle-box bearings are one of the most critical mechanical components of the high-speed train. Vibration signals collected from axle-box bearings are usually nonlinear and nonstationary, caused by the complicated operating conditions. Due to the high reliability and real-time requirement of axle-box bearing fault diagnosis for high-speed trains, the accuracy and efficiency of the bearing fault diagnosis method based on deep learning needs to be enhanced. To identify the axle-box bearing fault accurately and quickly, a novel approach is proposed in this paper using a simplified shallow information fusion-convolutional neural network (SSIF-CNN). Firstly, the time domain and frequency domain features were extracted from the training samples and testing samples before been inputted into the SSIF-CNN model. Secondly, the feature maps obtained from each hidden layer were transformed into a corresponding feature sequence by the global convolution operation. Finally, those feature sequences obtained from different layers were concatenated into one-dimensional as the fully connected layer to achieve the fault identification task. The experimental results showed that the SSIF-CNN effectively compressed the training time and improved the fault diagnosis accuracy compared with a general CNN.

Download Full-text

A deep convolutional neural network approach with information fusion for bearing fault diagnosis under different working conditions

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406220902181 ◽

2020 ◽

pp. 095440622090218

Author(s):

Tang Tang ◽

Tianhao Hu ◽

Ming Chen ◽

Ronglai Lin ◽

Guorui Chen

Keyword(s):

Neural Network ◽

Fault Diagnosis ◽

Convolutional Neural Network ◽

Information Fusion ◽

Vibration Signal ◽

Deep Convolutional Neural Network ◽

Feature Representation ◽

Training Data ◽

Data Sets ◽

Neural Network Approach

In recent years, deep learning-based fault diagnosis methods have drawn lots of attention. However, for most cases, the success of machine learning-based models relies on the circumstance that training data and testing data are under the same working condition, which is too strict for real implementation cases. Combined with the features of robustness of deep convolutional neural network and vibration signal characteristics, information fusion technology is introduced in this study to enhance the feature representation capability as well as the transferability of diagnosis models. With the basis of multi-sensors and narrow-band decomposition techniques, a convolutional architecture named fusion unit is proposed to extract multi-scale features from different sensors. The proposed method is tested on two data sets and has achieved relatively higher generalization ability when compared with several existing works, which demonstrates the effectiveness of our proposed fusion unit for feature extraction on both source task and target task.

Download Full-text

Fault Diagnosis for Methane Sensors using Generalized Regression Neural Network

International Journal of Online Engineering (iJOE) ◽

10.3991/ijoe.v12i03.5443 ◽

2016 ◽

Vol 12 (03) ◽

pp. 42 ◽

Cited By ~ 2

Author(s):

Kaifeng Huang ◽

Zegong Liu ◽

Dan Huang

Keyword(s):

Neural Network ◽

Fault Diagnosis ◽

Information Fusion ◽

Residual Error ◽

Generalized Regression Neural Network ◽

Error Signal ◽

The Neural Network ◽

Diagnosis Method ◽

Sensor Information ◽

Generalized Regression

To identify the hang, collision and drift faults of methane sensors, this paper presents a fault diagnosis method for methane sensors using multi-sensor information fusion. A methane concentration monitoring approximation model with multi-sensor information fusion is established based on generalized regression neural network (GRNN).The output of the neural network is compared with the measured value of the sensor to be diagnosed to obtain the variation curve of the residual error signal. Through the analysis of the variation tendency of the residual error signal, the fault status of a methane sensor could be determined based on a reasonable threshold. Through simulation comparison is applied between the two models of GRNN and BP neural network; verify the GRNN model is much more precise in the approximation of methane concentrations. Fault diagnosis for methane sensors using generalized regression neural network is effective and more efficient.

Download Full-text