Performance Degradation Prediction of PEMFC Based on Adaptive Variational Mode Decomposition and Deep Belief Network

2021 ◽  
Author(s):  
Yucen Xie ◽  
Jianxiao Zou ◽  
Chao Peng ◽  
Yun Zhu
Keyword(s):  
Performance Degradation ◽  
Deep Belief Network ◽  
Variational Mode Decomposition ◽  
Belief Network ◽  
Mode Decomposition

scholarly journals A Precise Diagnosis Method of Structural Faults of Rotating Machinery based on Combination of Empirical Mode Decomposition, Sample Entropy, and Deep Belief Network

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 591 ◽  
Author(s):  
Zhaoyi Guan ◽  
Zhiqiang Liao ◽  
Ke Li ◽  
Peng Chen
Keyword(s):  
Empirical Mode Decomposition ◽  
Sample Entropy ◽  
Rotating Machinery ◽  
Deep Belief Network ◽  
Superior Performance ◽  
Intrinsic Mode Functions ◽  
Belief Network ◽  
Mode Decomposition ◽  
Reconstructed Signal ◽  
Fault Information

To precisely diagnose the rotating machinery structural faults, especially structural faults under low rotating speeds, a novel scheme based on combination of empirical mode decomposition (EMD), sample entropy, and deep belief network (DBN) is proposed in this paper. EMD can decompose a signal into several intrinsic mode functions (IMFs) with different signal-to-noise ratios (SNRs) and sample entropy is performed to extract the signals that carry fault information with high SNR. The extracted fault signal is reconstructed into a new vibration signal that will carry abundant fault information. DBN has strong feature extraction and classification performance. It is suitably performed to build the diagnosis model based on the reconstructed signal. The effectiveness of the proposed method is validated by structural faults signal and the comparative experiments (BPNN, CNN, time-domain signal only, frequency-domain signal only). The results show that the diagnosis accuracy of the proposed method is between 99% and 100%, the BPNN is less than 25%, and the CNN is between 70% and 95%, which means the verified, proposed method has a superior performance to diagnose the structural fault.

An unsupervised and enhanced deep belief network for bearing performance degradation assessment

Measurement ◽  
2020 ◽  
Vol 162 ◽  
pp. 107902 ◽  
Author(s):  
Fan Xu ◽  
Zhou Fang ◽  
Ruoli Tang ◽  
Xin Li ◽  
Kwok Leung Tsui
Keyword(s):  
Performance Degradation ◽  
Deep Belief Network ◽  
Belief Network
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