| 基于双谱分析的内燃机曲轴轴承磨损故障的诊断研究 |
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| 引用本文： | 贾继德,刘志刚,孔凡让,干方建,张平.基于双谱分析的内燃机曲轴轴承磨损故障的诊断研究[J].中国科学技术大学学报,2004,34(6):688-693. |
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| 作者姓名： | 贾继德 刘志刚 孔凡让 干方建 张平 |
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| 作者单位： | 1. 中国科学技术大学精密仪器与机械系,合肥,230026;蚌埠汽车管理学院,蚌埠,233011
2. 中国科学技术大学精密仪器与机械系,合肥,230026 |
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| 摘 要： | 引入高阶统计量诊断曲轴轴承磨损故障,在EQ6100汽油发动机上模拟设置四种曲轴轴承间隙,并应用双干谱、双谱对振动信号进行了分析比较,结果显示双谱有效地抑制了噪声影响,较好地对曲轴轴承四种磨损状态进行了分类和识别,并揭示了非线性相位耦合随曲轴轴承磨损状态的变化规律;而运用双谱沿频率ω1=ω2的对角切片提取了曲轴轴承磨损故障诊断的特征参数,并有效地诊断了该故障.
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| 关 键 词： | 主轴承磨损 双谱 双相干谱 双谱对角切片 非线性相位耦合 |
| 文章编号： | 0253-2778(2004)06-0688-06 |
| 修稿时间： | 2003年9月11日 |
Diagnosis Research on Main Bearing Faults Based on Bispectral Analysis |
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| JIA Ji-de,LIU Zhi-gang,KONG Fan-rang,GAN Fangjian,ZHANG Ping.Diagnosis Research on Main Bearing Faults Based on Bispectral Analysis[J].Journal of University of Science and Technology of China,2004,34(6):688-693. |
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| Authors: | JIA Ji-de LIU Zhi-gang KONG Fan-rang GAN Fangjian ZHANG Ping |
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| Affiliation: | JIA Ji-de~1,2,LIU Zhi-gang~1,KONG Fan-rang~1,GAN Fangjian~1,ZHANG Ping~1 |
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| Abstract: | Vibration signals caused by different main bearing clearances are not stationary and time-variant.It is difficult to detect early and diagnose by means of traditional methods.A new method based on bispectral analysis for main bearing faults of the engine is presented.The different clearances of the main bearing of the previously designed EQ6100 engine.Vibration signals are obtained from engine block.Applying the bispectrum and bicoherence analysis to the vibration signals,the fault features are extracted.The diagonal slice of the bispectrum can clearly show different working conditions,which makes much easier recognition.Research result proves that this method can reduce noise and describe the nonlinear phase couple for the engine faults. |
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| Keywords: | main-bearing wears bispectrum bicoherence nonlinear phase couple |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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