• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
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  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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Volume 16 Issue 5
Oct.  2003
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Article Contents
QIAN Shu-hua, WANG Xin-qing, LIHuan-liang. Application of Quadric Time-Frequency Distributionto Mechanical Fault Diagnosis[J]. Journal of Southwest Jiaotong University, 2003, 16(5): 578-580.
Citation: QIAN Shu-hua, WANG Xin-qing, LIHuan-liang. Application of Quadric Time-Frequency Distribution to Mechanical Fault Diagnosis[J]. Journal of Southwest Jiaotong University, 2003, 16(5): 578-580.

Application of Quadric Time-Frequency Distribution to Mechanical Fault Diagnosis

  • Publish Date: 25 Oct 2003
  • Quadric time-frequency distribution can reveal the characteristic of signals by means of the combination of the features of time and frequency domains. A new time-frequency distribution was proposed by designing a new kernel function with a narrow time domain and a wide frequency domain and concentration of energy in low frequencies. The new time-frequency distribution has great power in analyzing various complex signals. An example is presented to show that the distribution has a high resolution in both time and frequency domains, and can reveal cyclic weak pulse components merged in the strong background of resonance noises and harmonic components. Such a distribution is a power tool for the diagnosis of mechanical faults.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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