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论文:2013,Vol:31,Issue(3):401-405 |
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引用本文： |
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王仲生, 李明, 王翔. 航空发动机突发故障识别与监控方法研究[J]. 西北工业大学 |
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Wang Zhongsheng, Li Ming, Wang Xiang. An Effective Method of Identification and Monitoring of Sudden Fault on Aero-Engine[J]. Northwestern polytechnical university |
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| 航空发动机突发故障识别与监控方法研究 |
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| 王仲生, 李明, 王翔 |
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| 西北工业大学 航空学院, 陕西 西安 710072 |
| 摘要: |
| 航空发动机突发故障严重影响飞机的飞行安全。为了解决航空发动机故障诊断中因缺乏样本和突发故障信息难以提取的困难,提出了基于支持向量机、小波包分解和智能模块相结合的发动机突发故障识别与监控方法。该方法在强噪声和少样本条件下,用结构风险最小原理建立发动机故障特征与运行状态之间的对应关系,再根据该函数的输出来识别故障状态和调用相应的智能模块对故障进行监控。实验结果表明,该方法能有效地提高航空发动机突发故障的识别率,并能对突发故障进行监控修复。 |
| 关键词:
飞机发动机
特征提取
突发故障
识别
监控
支持向量机
小波包分解
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| An Effective Method of Identification and Monitoring of Sudden Fault on Aero-Engine |
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| Wang Zhongsheng, Li Ming, Wang Xiang |
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| College of Aeronautics,Northwestern Polytechnical University,Xi'an 710072,China |
| Abstract: |
| Sudden fault of aero-engine seriously affects the flight safety of an aircraft.But there is a lack of data samples and it is difficult to extract information on sudden fault.Therefore, we propose what we believe to be an ef-fective method for their identification and monitoring, which combines a support vector machine (SVM) and wave-let packet decomposition (WPD) with intelligent modules.We extract the features of the sudden faults with the WPD and identify the sudden faults with the SVM.Under the conditions of strong background noise and data sam-ple lacking, we use the structural risk minimization principle to establish the function between the aero-engine's fault characteristics and its operation states.Then we use the output of the function to identify the sudden faults and then employ the intelligent modules to monitor and repair the sudden faults.Finally, we did experiments on their i-dentification and monitoring.The experimental results, given in Figs.1 and 3 and Tables 1 and 2, and their analy-sis show preliminarily that our method can extract quickly the features of sudden faults of an aero-engine and identi-fy them accurately and that it can also monitor and repair the sudden faults, thus effectively enhancing the safety and reliability of the aero-engine particularly at their early stage. |
| Key words:
aircraft engines
feature extraction
monitoring
support vector machines
identification
sudden fault
wavelet packet decomposition
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| 收稿日期: 2012-07-05
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(51075330、50675178)资助 |
| 通讯作者:
Email： |
| 作者简介: 王仲生(1946-),西北工业大学教授、博士生导师,主要从事飞行器故障诊断和健康监控研究。
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| 相关功能 |
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| 作者相关文章 |
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| 王仲生 在本刊中的所有文章 |
| 李明 在本刊中的所有文章 |
| 王翔 在本刊中的所有文章 |
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