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Research on the Identification Methods of Friction in Kinematical Joints of Mechanical Systems

[+] Author Affiliations
Ziying Wu, Hongzhao Liu, Lilan Liu, Pengfei Li, Daning Yuan

Xi’an University of Technology, Xi’an, China

Paper No. WTC2005-63258, pp. 237-238; 2 pages
doi:10.1115/WTC2005-63258
From:
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME

abstract

This paper describes two approaches for the simultaneous identification of the coulomb and viscous parameters in kinematical joints. One is a time-domain method (TDM) and the other is a frequency-domain method (FDM). Simulation shows that both of the two methods have good performances in identifying friction at high SNR (90dB). But at low SNR (20dB), the estimation accuracy of the frequency-domain method is higher than that of the time-domain method. A field experiment employing a linkage mechanism driven by motor is also carried out. The experimental results obtained by the two approaches are almost identical under different experiment conditions. It has been concluded that the presented identification methods of friction in kinematical joints are correct and applicable.

Copyright © 2005 by ASME
Topics: Friction

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