声明
List of Figures
List of Tables
Chapter 1 Introduction
1.1 Background and motivation
1.2 Literature review
1.2.1 Machine condition monitoring techniques
1.2.2 The Early Fault Features Extraction of Rolling Element Bearing
1.3 Thesis Outline
1.4 Summary
Chapter 2 The Fundamentals of Rolling Element Bearings
2.1 The basic structures of bearings
2.1.1 Rolling element bearing Description and Components
2.1.2 Dynamic Responses of Roller Bearing elements
2.2 Characteristic Symptoms for the Bearing fault
2.3 The Stage of Bearing Degradation
2.4 Summary
Chapter 3 An Approach to Recover Faulty Bearing Signal from The Heavy Noise Based on VMD and EEMD
3.1 Theoretical background
3.1.1 Variational Mode Decomposition
3.1.2 Ensemble empirical mode decomposition(EEMD)
3.2 The Proposed Method
3.2.1 An approach to recovery faulty bearing signal from large noise based on VMD and EEMD
3.3 Result and discussion
3.4 Summary
Chapter 4 Bearing Fault Diagnosis Method Based on Infogram with Envelope
4.1 Theoretical background
4.1.1 The concept of entropy
4.1.2 Spectral Negentropy and Infogram
4.1.3 Pre-whitening
4.1.4 Envelope analysis techniques
4.2 The Proposed Approach
4.3 Experimental results and discussions
4.3.1 Diagnosis of the Bearing(outer race fault)
4.3.2 Discussion
4.4 Summary
Chapter 5 Early Fault Detection and Intimal Fault Time Estimation by Infogram with VMD
5.1 An overview of the methodology
5.2 Experimental set-up
5.3 Experimental Results
5.4 Discussions
5.5 Summary
Conclusions and Future work
Conclusions
Future work
参考文献
致谢
List of publications
