A two-step procedure for estimation of instantaneous rotational speed with large fluctuations

Jacek Urbanek, Tomasz Barszcz, Jerome Antoni

Research output: Contribution to journalArticlepeer-review

114 Scopus citations


This paper addresses the issue of estimating the machine rotational speed based on vibration signal measurement. Advantages and limitations of existing methods are presented. Most of these methods give insufficient results when dealing either with significant variations of the rotational speed or with signals of relatively complex spectral characteristic. In order to overcome these obstacles, a new two-step method for instantaneous frequency estimation is proposed. The described method is based on principles of phase demodulation and joint time-frequency analysis, taking advantage of both of them. The paper presents the method and the algorithm for its implementation on the example of a simulated vibration signal. Finally, test rig experiment vibration data is used to test the efficiency of the method.

Original languageEnglish (US)
Pages (from-to)96-102
Number of pages7
JournalMechanical Systems and Signal Processing
Issue number1
StatePublished - Jul 5 2013
Externally publishedYes


  • Angular resampling
  • Instantaneous frequency
  • Instantaneous phase
  • Rotational speed estimation
  • Time-frequency representation

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications


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