| 基于经验模式分解法的航空发动机振动传感器故障诊断技术研究 |
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| 引用本文： | 张宬,艾延廷,刘秀芳.基于经验模式分解法的航空发动机振动传感器故障诊断技术研究[J].沈阳航空工业学院学报,2008,25(4). |
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| 作者姓名： | 张宬 艾延廷 刘秀芳 |
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| 作者单位： | 沈阳航空工业学院工程振动与噪声研究所,辽宁,沈阳,110136 |
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| 摘 要： | 在深入研究经验模式分解法基本理论的基础上,针对航空发动机振动传感器故障的时频特征,提出一种基于经验模式分解法的传感器故障诊断新方法.该方法的关键在于将含有传感器故障的航空发动机振动测试信号进行经验模式分解,利用这种方法的局部自适应特性和时频多分辨率分析将传感器输出信号的局部特性细化,使故障信息凸显出来.分析结果表明,该方法可以准确诊断传感器软、硬故障,有效降低误报率和漏报率,具有很好的应用价值.
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| 关 键 词： | 经验模式分解 航空发动机 传感器故障诊断 多分辨率分析 |
Research on sensor faults diagnosis for aero - engine vibration testing using empirical mode decomposition method |
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| ZHANG Cheng,AI Yan-ting,LIU Xiu-fang.Research on sensor faults diagnosis for aero - engine vibration testing using empirical mode decomposition method[J].Journal of Shenyang Institute of Aeronautical Engineering,2008,25(4). |
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| Authors: | ZHANG Cheng AI Yan-ting LIU Xiu-fang |
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| Abstract: | Base on Empirical Mode Decomposition theory and focus on sensor's fault characteristics in time and frequency domain,a method using Empirical Mode Decomposition to diagnose faults of sensors used in aero-engine vibration test is proposed in this paper.This method zooms the output signal of sensors in local area using multi-resolution analysis to distinguish faults from the normal signal.The analysis results prove that the method has a superior skill in detecting sensor's soft and hard faults,and reducing the distortion and failing report effectively,it is of good value in the research field. |
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| Keywords: | empirical mode decomposition aero-engine sensor fault diagnosis multi-resolution analysis |
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