Application Of Swt-Autocorrelation Method In Gear Weak Fault Diagnosis

2021 ◽  
Author(s):  
Meng-yuan ZHAO ◽  
Xu-guang ZHANG ◽  
Jun-fa LENG ◽  
Shuang-xi JING
Keyword(s):  
Fault Diagnosis ◽  
Weak Fault ◽  
Autocorrelation Method

scholarly journals An Enhanced Intrinsic Time-Scale Decomposition Method Based on Adaptive Lévy Noise and Its Application in Bearing Fault Diagnosis

Symmetry ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 617
Author(s):  
Jianpeng Ma ◽  
Shi Zhuo ◽  
Chengwei Li ◽  
Liwei Zhan ◽  
Guangzhu Zhang
Keyword(s):  
Fault Diagnosis ◽  
Time Scale ◽  
Lévy Noise ◽  
Model Parameters ◽  
Rolling Bearings ◽  
Intrinsic Time ◽  
Time Scale Decomposition ◽  
Weak Fault ◽  
Levy Noise ◽  
The Impact

When early failures in rolling bearings occur, we need to be able to extract weak fault characteristic frequencies under the influence of strong noise and then perform fault diagnosis. Therefore, a new method is proposed: complete ensemble intrinsic time-scale decomposition with adaptive Lévy noise (CEITDALN). This method solves the problem of the traditional complete ensemble intrinsic time-scale decomposition with adaptive noise (CEITDAN) method not being able to filter nonwhite noise in measured vibration signal noise. Therefore, in the method proposed in this paper, a noise model in the form of parameter-adjusted noise is used to replace traditional white noise. We used an optimization algorithm to adaptively adjust the model parameters, reducing the impact of nonwhite noise on the feature frequency extraction. The experimental results for the simulation and vibration signals of rolling bearings showed that the CEITDALN method could extract weak fault features more effectively than traditional methods.

A novel weak fault diagnosis method for rolling bearings based on LSTM considering quasi-periodicity

2021 ◽  
pp. 107413
Author(s):  
Dawei Gao ◽  
Yongsheng Zhu ◽  
Zhijun Ren ◽  
Ke Yan ◽  
Wei Kang
Keyword(s):  
Fault Diagnosis ◽  
Rolling Bearings ◽  
Diagnosis Method ◽  
Weak Fault

scholarly journals Actuator Weak Fault Diagnosis in Autonomous Underwater Vehicle Based on Tri-Stable Stochastic Resonance

2020 ◽  
Vol 10 (6) ◽  
pp. 2048 ◽  
Author(s):  
Yang Jiang ◽  
Bo He ◽  
Jia Guo ◽  
Pengfei Lv ◽  
Xiaokai Mu ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Stochastic Resonance ◽  
Autonomous Underwater Vehicle ◽  
Underwater Vehicle ◽  
Ant Colony ◽  
Resonance System ◽  
Resonance Model ◽  
Weak Fault

The autonomous underwater vehicle (AUV) is mainly used in the development and exploration of the ocean. As an important module of the AUV, the actuator plays an important role in the normal execution of the AUV. Therefore, the fault diagnosis of the actuator is particularly important. At present, the research on the strong faults, such as the winding of the actuator, has achieved good results, but the research on the weak fault diagnosis is relatively rare. In this paper, the tri-stable stochastic resonance model is analyzed, and the ant colony tri-stable stochastic resonance model is used to diagnose the weak fault. The system accurately diagnoses the fault of the actuator collision and verifies the adaptive tri-stable stochastic resonance system. This model has better diagnostic results than the bi-stable stochastic resonance system.

Weak-fault diagnosis using state-transition-algorithm-based adaptive stochastic-resonance method

2019 ◽  
Vol 26 (7) ◽  
pp. 1910-1920 ◽  
Author(s):  
Jin-tian Yin ◽  
Yong-fang Xie ◽  
Zhi-wen Chen ◽  
Tao Peng ◽  
Chun-hua Yang
Keyword(s):  
Fault Diagnosis ◽  
Stochastic Resonance ◽  
State Transition ◽  
Resonance Method ◽  
State Transition Algorithm ◽  
Weak Fault

scholarly journals Investigation on Planetary Bearing Weak Fault Diagnosis Based on a Fault Model and Improved Wavelet Ridge

Energies ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 1286 ◽  
Author(s):  
Hongkun Li ◽  
Rui Yang ◽  
Chaoge Wang ◽  
Changbo He
Keyword(s):  
Fault Diagnosis ◽  
Fault Model ◽  
Weak Fault ◽  
Wavelet Ridge

A weak fault diagnosis scheme for common rail injector based on MGOA-MOMEDA and improved hierarchical dispersion entropy

2020 ◽  
Vol 32 (2) ◽  
pp. 025012
Author(s):  
Ke Yun ◽  
Yao Chong ◽  
Song Enzhe ◽  
Yang Liping ◽  
Dong Quan
Keyword(s):  
Fault Diagnosis ◽  
Common Rail ◽  
Common Rail Injector ◽  
Weak Fault
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