基于时频反射的飞机导线故障诊断方法

石旭东, 裴鹤岩, 荆涛, 王立文

石旭东, 裴鹤岩, 荆涛, 王立文. 基于时频反射的飞机导线故障诊断方法[J]. 信息与控制, 2010, 39(1): 77-81.
引用本文: 石旭东, 裴鹤岩, 荆涛, 王立文. 基于时频反射的飞机导线故障诊断方法[J]. 信息与控制, 2010, 39(1): 77-81.
SHI Xudong, PEI Heyan, JING Tao, WANG Liwen. Aircraft Cable Fault Diagnosis Based on Time-Frequency Reflection[J]. INFORMATION AND CONTROL, 2010, 39(1): 77-81.
Citation: SHI Xudong, PEI Heyan, JING Tao, WANG Liwen. Aircraft Cable Fault Diagnosis Based on Time-Frequency Reflection[J]. INFORMATION AND CONTROL, 2010, 39(1): 77-81.

基于时频反射的飞机导线故障诊断方法

基金项目: 国家自然科学基金委员会与中国民用航空总局联合资助项目(60776809)
详细信息
    作者简介:

    石旭东(1972- ),男,博士,副教授.研究领域为测试设备与故障诊断技术,机电控制技术. 
    裴鹤岩(1983- ),男,硕士生.研究领域为故障诊断技术,虚拟仪器技术.

    通讯作者:

    石旭东, stone_131@sina.com.cn

  • 中图分类号: TP206+.3

Aircraft Cable Fault Diagnosis Based on Time-Frequency Reflection

  • 摘要: 在基于时域反射的飞机导线故障诊断方法中,针对局部故障、连续故障和跨转接头故障反射信号微弱、信号衰减严重而使故障点难以诊断的问题,提出了基于时频反射的飞机导线故障诊断方法,使故障更易被发现,提高飞机导线故障检出率.另外,时频反射方法中检测信号易受噪声信号干扰而产生故障误报,因此,特采用小波系数收缩算法对检测信号进行降噪处理,降低飞机导线故障诊断误报率.最后,通过实验验证了该方法的可行性并与时域反射法进行了比较,结果表明基于时频反射的飞机导线故障诊断方法在故障检出率和误报率方面均有明显改善.
    Abstract: An airplane cable faults diagnosis method based on time-frequency domain reflection is proposed to solve the problems of being difficult to diagnose part faults,serial faults and after-junction faults because of weak echo signal and serious decay in the time domain reflection method.The time-frequency domain reflection method can diagnose faults more easily and improve the hit rates.In addition,the threshold de-noising method based on wavelet decomposition is utilized to eliminate the interference of noise and reduce the false alarm rates.The feasibility is verified and the comparison with time domain reflection method is processed by experiments.The results show that the time-frequency domain reflection method is better than the time domain reflection method in the aspects of hit rates and false alarm rates.
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出版历程
  • 收稿日期:  2009-07-14
  • 发布日期:  2010-02-19

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