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Calibration of Measured FRFs Based on Mass Identification Method

[+] Author Affiliations
Jun Ren, Jun Wang, Quan Wang, Qiong Wei, Jinfeng Sun

Hubei University of Technology, Wuhan, Hubei, China

Kwun-Lon Ting

Tennessee Technological University, Cookeville, TN

Paper No. DETC2015-48061, pp. V008T13A094; 5 pages
doi:10.1115/DETC2015-48061
From:
  • ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 27th Conference on Mechanical Vibration and Noise
  • Boston, Massachusetts, USA, August 2–5, 2015
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5718-1
  • Copyright © 2015 by ASME

abstract

It is necessary to calibrate the equipment during each test in modal testing. This paper presented a practical method for the calibration of the measured FRFs based on mass identification method. One advantage of this proposed method is that the calibration is performed directly on the test structure. Thus, it is more reliable and convenient. It is shown that if the mass identification method is applied to the uncalibrated system, a different level between the identified mass and the given exact mass reveals that the set up is not calibrated. And the measured FRFs can be calibrated using the ratio factor of the identified mass and exact mass. The simulation testing demonstrates good performance. In practical testing, however, the accuracy of mass identification results may be vulnerable to the noise and further work is necessary in order to solve this difficulty.

Copyright © 2015 by ASME
Topics: Calibration

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