噪声与振动控制

›› 2012, Vol. 32 ›› Issue (1): 124-127.DOI: 10.3969/j.issn.1006-1355-2012.01.029

• 6.信号处理与故障诊断 • 上一篇    下一篇

航空发动机转静子碰摩故障信号用小波分析的方法检测和分析

符娆,张群岩,赵述元   

  1. （ 中国飞行试验研究院， 西安 710089 ）
  • 收稿日期:2011-03-25 修回日期:2011-04-26 出版日期:2012-02-18 发布日期:2012-02-18
  • 通讯作者: 符娆

Detection and Analysis of Aeroengine Rotor-stator Rubbing Trouble using Wavelet Analysis

FU Rao,ZHANG Qun-yan,ZHAO Shu-yuan   

  1. （ Engine Department of Chinese Flight Test Establishment, Xi’an 710089, China ）
  • Received:2011-03-25 Revised:2011-04-26 Online:2012-02-18 Published:2012-02-18
  • Contact: FU Rao

摘要： 针对试飞中发动机转静子碰摩故障信号，首先应用小波阈值方法对原始信号进行降噪处理，由此滤除高频噪声干扰，同时可保留含有重要故障特征的突变信息；对降噪后信号进行连续小波变换，时频分析结果具有很好的实时跟踪转速频率能力，且频带清晰，故障特征明显，为今后真实飞行载荷下的实时故障监测提供一种有效途径。

关键词: 振动与波, 航空发动机, 碰摩, 小波阈值降噪, 小波分析

Abstract: The rotor-stator rubbing signals of aeroengines in flight test are processed and analyzed. Firstly the original signal is denoised by wavelet threshold method so that the high-frequency noise is filtered and the saltatory information including important fault characteristics is reserved. Then the denoised signal is processed by continuous wavelet transform. The result from time-frequency analysis shows that it has a strong capability to track the rotor frequency in real-time. Furthermore, the energy of the frequency band is centralized and the fault features are obvious. So this method provides an effective approach for real-time fault monitoring of rotor-stator rubbing with the actual flight loads on.

Key words: vibration and wave, aeroengine, rub-impact, wavelet threshold denosing, wavelet analysis

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