Detecting and quantifying friction nonlinearity using the Hilbert transform

M. A. Minnicino, H. J. Sommer

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


A simple methodology for identification and quantification of nonlinear effects such as Coulomb friction and backlash is desired for use in condition based maintenance programs for both structural and machine based applications. Typically, structural applications are passive and undergo small vibratory motion when an external excitation is presented to the system. A spring-mass system was used as the structural example. Machine applications are typically active and motion is excited by internal actuation of large motion within the system. An industrial SCARA robot was used as the machine based example. The Hubert transform was tested for detection and quantification of Coulomb friction in both systems.

Original languageEnglish (US)
Pages (from-to)419-427
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2004
EventHealth Monitoring and Smart Nondestructive Evaluation of Structural and Biological Systems III - San Diego, CA, United States
Duration: Mar 15 2004Mar 17 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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