Application of RBF Neural Network Based on Wavelet Packet denosing and EMD method in fault diagnosis for turbine generator

2010 ◽  
Author(s):  
Ze Dong ◽  
Juan-ning Si ◽  
Bao-hai Huang ◽  
Pu Han
Keyword(s):  
Neural Network ◽  
Fault Diagnosis ◽  
Rbf Neural Network ◽  
Wavelet Packet ◽  
Turbine Generator ◽  
Emd Method

Diagnosis Technique Based on BP and D-S Theory

2011 ◽  
Vol 179-180 ◽  
pp. 544-548
Author(s):  
Qiu Yun Mo ◽  
Jie Cao ◽  
Feng Gao
Keyword(s):  
Neural Network ◽  
Fault Diagnosis ◽  
Rbf Neural Network ◽  
Wavelet Packet ◽  
The Neural Network ◽  
Evidential Theory ◽  
The Given ◽  
Fusion Framework ◽  
Level Fusion ◽  
Theory And Experiments

This paper constructs a common data fusion framework of fault diagnosis, by combining local neural networks with dempster-shafer (D-S) evidential theory. The RBF neural network is proposed as a local neural network of the fault pattern recognition, and its input vectors are extracted by the wavelet packet decomposition of various frequency energy. Then, the signal of each sensor separately has a feature level fusion. This method is effective, verified by experiments. The given decision level fusion is based on combining the features of the neural network and the D-S theory, and experiments show the results of the fault diagnosis are more accurate by this method.

Fault Diagnosis of Cascaded Converter Based on Wavelet Packet RBF Neural Network

2013 ◽  
Vol 273 ◽  
pp. 300-304
Author(s):  
Xin Wang ◽  
Juan Xu ◽  
Guo Dong Zhang ◽  
Rui Min Qi
Keyword(s):  
Neural Network ◽  
Fault Diagnosis ◽  
Learning Algorithm ◽  
Rbf Neural Network ◽  
Wavelet Packet ◽  
Open Circuit ◽  
Learning Performance ◽  
Cascaded Converter ◽  
Diagnosis Method ◽  
Faults Diagnosis

To study the power component open circuit faults diagnosis method of the cascaded converter. Aiming at the insufficiency of the BP learning algorithm in the machinery fault diagnosis, such as the low learning convergence speed, the easily appearing local minimum, the instability learning performance caused by the initial value, to proposed a new method applied to the cascaded converter based on radial basis function (RBF) neural network. Experiments show that the method based on wavelet packet analysis and RBF neural network has better learning and fault identification capability, and it can meet the online real-time fault diagnosis of the cascaded converter.

Fault Diagnosis on Transmission System of Wind Turbines Based on Wavelet Packet Transform and RBF Neural Networks

2013 ◽  
Vol 373-375 ◽  
pp. 1102-1105 ◽  
Author(s):  
Xiao Yun Wang
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Feature Extraction ◽  
Fault Diagnosis ◽  
Wind Turbine ◽  
Rbf Neural Network ◽  
Wavelet Packet ◽  
Transmission System ◽  
Wavelet Packet Transform ◽  
Fault Classification

Wind turbine transmission system with abundant fault feature and variable types, the vibration signal was a carrier of fault features and it can reflect most of the fault information in the wind turbine transmission system. As there were a large number of transient and non-stationary signals accompany with the vibration signals, so wavelet packet transform was adopted for feature extraction. As RBF Neural network has a strong nonlinear mapping ability and self-adaptability, so it was introduced to the diagnosis system for network training, the neural networks structure and learning algorithm was presented, which could enhance the accuracy of diagnosis. The two-level neural networks recognition method was proposed, first level for fault classification and second level for fault diagnosis. The example shows that this method can be effectively applied to transmission system of wind turbine fault diagnosis with wavelet packet algorithm for fault feature extraction and RBF neural network for pattern recognition.

Fault Diagnosis of Rolling Bearing Based on Wavelet Packet and RBF Neural Network

2021 ◽  
Author(s):  
Yueting Li ◽  
Zhenshan Zhang ◽  
Guohua Cui ◽  
Shipei Li ◽  
Lianzhe Guan ◽  
...  
Keyword(s):  
Neural Network ◽  
Fault Diagnosis ◽  
Rbf Neural Network ◽  
Wavelet Packet ◽  
Rolling Bearing
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