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基于声信号的风电机齿轮箱故障诊断研究

摘要第5-6页
ABSTRACT第6页
Chapter 1 Introduction第9-25页
    1.1 Research Background and Significance第9-13页
    1.2 Literature review第13-23页
        1.2.1 Fault diagnosis of Wind Turbine Gearboxes第13-18页
        1.2.2 Acoustic signal analysis of the fault diagnosis第18-23页
    1.3 Thesis organization第23-25页
Chapter 2 Failure modes of Gearbox and Signal feature第25-37页
    Introduction第25页
    2.1 Main failure of Gearboxes第25-33页
        2.1.1 The Gearbox as the fault origin第25-26页
        2.1.2 Main fault in Gearboxes第26-33页
    2.2 The Mechanism of gear noise第33-35页
        2.2.1 Gear mechanics第34-35页
    2.3 Summary第35-37页
Chapter 3 The combination of Hilbert and Wavelet packet transforms method第37-60页
    Introduction第37页
    3.1 Analysis of gear vibration signals第37-39页
    3.2 The combined Hilbert and Wavelet packet transforms method第39-58页
        3.2.1 Hilbert transform第39-40页
        3.2.2 Wavelet packet transform第40-45页
        3.2.3 Spectrum Estimation through Wavelet packet tree construction第45-52页
        3.2.4 The combined method第52-53页
        3.2.5 Evaluation of the combined method第53-58页
    3.3 Analysis of gear acoustic signals第58-59页
    3.4 Summary第59-60页
Chapter 4 Application of the combination method to fault diagnosis of gearbox第60-85页
    Introduction第60页
    4.1 Data Acquisition第60-74页
        4.1.1 The Establishment of the Hardware Part第61-65页
        4.1.2 The Establishment of the Software Part第65-74页
    4.2 Experimental study第74-84页
        4.2.1 Description of experimental system第74-76页
        4.2.2 Collect acoustic signals using the actual model第76-78页
        4.2.3 Simulation of Gear faults第78-79页
        4.2.4 Results and Discussion第79-84页
    4.3 Summary第84-85页
Conclusions and Future Research第85-86页
References第86-91页
Acknowledgement第91-92页
Curriculum Vitae第92页

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