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行星齿轮动态信号分析与故障诊断方法研究

摘要第3-4页
Abstract第4页
1. Introduction第9-23页
    1.1. Research Background and Significance第9-13页
    1.2 Domestic and overseas progress第13-14页
    1.3 Literature review第14-20页
        1.3.1 Mesh stiffness calculation of static shaft gears第14-15页
        1.3.2 Mesh stiffness evaluation of a planetary gear set第15-17页
        1.3.3 Crack effect on the mesh stiffness第17-18页
        1.3.4 Dynamic analysis based on vibration signal modeling第18-19页
        1.3.5 Vibration signal decomposition for gear tooth fault detection第19-20页
    1.4 Fault detection of planetary gearbox第20-22页
        1.4.1 Evaluating time-varying mesh stiffness第20页
        1.4.2 Vibration signal modeling for tooth crack detection第20-21页
        1.4.3 Solution Method第21-22页
    1.5 Major content and methodology of the dissertation第22-23页
2 Characteristics of gears & their vibration signal processing method第23-34页
    2.1 Gear vibration mechanism第23-24页
    2.2 Modulation of side band & distribution characteristics第24-27页
        2.2.1 Amplitude modulation第25-26页
        2.2.2 Frequency modulation (Phase modulation)第26页
        2.2.3 Frequency modulation and amplitude modulation第26-27页
    2.3 Characteristics & vibration signal of typical fault gears第27-29页
        2.3.1 Gear Crack第27-28页
        2.3.2 Gear pitting and tooth surface failure第28页
        2.3.3 Gear wear第28-29页
        2.3.4 Gear eccentricity fault第29页
        2.3.5 Axis misalignment第29页
    2.4 Gear vibration & signal processing method第29-31页
        2.4.1 Acquisition of vibration data第30-31页
    2.5 Method and analysis of signal processing第31-34页
        2.5.1 The concept of non-stationary signals第31-32页
        2.5.2 Frequency domain processing第32-33页
        2.5.3 Time frequency analysis第33-34页
3 Theory analysis of planetary gear train第34-46页
    3.1 Introduction of planetary gear system and its dynamic modeling第34-41页
        3.1.1 Planetary gear transmission第34-35页
        3.1.2 The working principle of the planetary gear system第35-36页
        3.1.3 Basic characteristics of planetary gear system第36-37页
        3.1.4 Planetary gear dynamic modeling第37-41页
    3.2 Definitions and Basic Properties第41-43页
        3.2.1 Moment of inertia第41-42页
        3.2.2 Module第42页
        3.2.3 Clearance第42页
        3.2.4 Pressure angle第42页
        3.2.5 Pitch diameter第42页
        3.2.6 Pitch circle第42-43页
        3.2.7 Base diameter第43页
    3.3 Numerical parameters of planetary gearbox第43页
    3.4 Mechanical and physical properties of Q235 Steel第43-46页
4 Experimental Analysis第46-54页
    4.1 Numerical Simulation and experimental validation第46-47页
        4.1.1 Description of test rig第46-47页
    4.2 Characteristics and meshing frequencies of planetary gears第47-49页
        4.2.1 Meshing Frequency第47-48页
        4.2.2 Characteristic Frequency of Sun Gear第48页
        4.2.3 Characteristic Frequency of Planet Gear第48页
        4.2.4 Characteristic Frequency of ring Gear第48-49页
    4.3 Normal & damaged gear simulation第49-51页
        4.3.1 Planet Gear Damage第49-51页
    4.4 Variable speed第51-53页
        4.4.1 Data analysis第51-53页
    4.5 Validation of the results第53-54页
5 Feature Extraction and Fault Diagnosis第54-75页
    5.1 Structure of gear vibration test bench第54-55页
        5.1.1 Speed regulation mode第54页
        5.1.2 Loading method第54页
        5.1.3 Test-bed第54-55页
    5.2 The composition of data acquisition system第55-56页
    5.3 Collection and arrangement of experimental data第56-58页
        5.3.1 Parameters of the experimental object第56-57页
        5.3.2 Selection of experimental conditions第57页
        5.3.3 Layout and selection of measuring points第57-58页
        5.3.4 Vibration test method and data acquisition第58页
    5.4 Feature extraction第58-62页
        5.4.1 Time domain analysis of vibration signals第58-60页
        5.4.2 Frequency domain analysis of vibration signals第60-62页
    5.5 A summary of time domain and frequency domain analysis methods第62页
    5.6 Basic concept and theories of empirical mode Decomposition第62-65页
        5.6.1 Intrinsic mode function (IMF)第62-63页
        5.6.2 Empirical mode decomposition (EMD)第63-65页
    5.7 Extraction of gear fault feature information Using EMD第65-75页
        5.7.1 EMD of gear with normal state第65-68页
        5.7.2 EMD of gear tooth crack第68-71页
        5.7.3 EMD of broken tooth gear第71-75页
Conclusion第75-76页
References第76-80页
Research Projects and Publications in Master Study第80-81页
Acknowledgement第81-83页

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