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Frontiers of Mechanical Engineering

, Volume 13, Issue 2, pp 292–300 | Cite as

Non-stationary signal analysis based on general parameterized time–frequency transform and its application in the feature extraction of a rotary machine

  • Peng Zhou
  • Zhike Peng
  • Shiqian Chen
  • Yang Yang
  • Wenming Zhang
Research Article
  • 45 Downloads

Abstract

With the development of large rotary machines for faster and more integrated performance, the condition monitoring and fault diagnosis for them are becoming more challenging. Since the time-frequency (TF) pattern of the vibration signal from the rotary machine often contains condition information and fault feature, the methods based on TF analysis have been widely-used to solve these two problems in the industrial community. This article introduces an effective non-stationary signal analysis method based on the general parameterized time–frequency transform (GPTFT). The GPTFT is achieved by inserting a rotation operator and a shift operator in the short-time Fourier transform. This method can produce a high-concentrated TF pattern with a general kernel. A multi-component instantaneous frequency (IF) extraction method is proposed based on it. The estimation for the IF of every component is accomplished by defining a spectrum concentration index (SCI). Moreover, such an IF estimation process is iteratively operated until all the components are extracted. The tests on three simulation examples and a real vibration signal demonstrate the effectiveness and superiority of our method.

Keywords

rotary machines condition monitoring fault diagnosis GPTFT SCI 

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Notes

Acknowledgements

The authors gratefully acknowledge the support provided by the National Natural Science Foundation of China (Grant Nos. 11632011, 11472170, 51421092, and 11572189) to this work.

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Copyright information

© Higher Education Press and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Peng Zhou
    • 1
  • Zhike Peng
    • 1
  • Shiqian Chen
    • 1
  • Yang Yang
    • 1
  • Wenming Zhang
    • 1
  1. 1.School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina

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