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Estimation of modal parameters using bilinear joint time-frequency distributions

Roshan Ghias, A ; Sharif University of Technology | 2007

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ymssp.2006.09.009
  3. Publisher: 2007
  4. Abstract:
  5. In this paper, a new method is proposed for modal parameter estimation using time-frequency representations. Smoothed Pseudo Wigner-Ville distribution which is a member of the Cohen's class distributions is used to decouple vibration modes completely in order to study each mode separately. This distribution reduces cross-terms which are troublesome in Wigner-Ville distribution and retains the resolution as well. The method was applied to highly damped systems, and results were superior to those obtained via other conventional methods. © 2006 Elsevier Ltd. All rights reserved
  6. Keywords:
  7. Damping ; Modal analysis ; Numerical methods ; Vibration analysis ; Bilinear joints ; Time frequency distributions ; Vibration modes ; Wigner-Ville distribution ; Parameter estimation
  8. Source: Mechanical Systems and Signal Processing ; Volume 21, Issue 5 , 2007 , Pages 2125-2136 ; 08883270 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0888327006001956