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The Experimental Determination of a Condition Indicator for Condition Based Maintenance

[+] Author Affiliations
Seth E. Farrington, M. Paul Buttram, Charles Boyles

The University of Alabama in Huntsville, Huntsville, AL

Paper No. IMECE2011-63702, pp. 499-502; 4 pages
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 9: Transportation Systems; Safety Engineering, Risk Analysis and Reliability Methods; Applied Stochastic Optimization, Uncertainty and Probability
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5495-2
  • Copyright © 2011 by ASME


The objective of this paper is to present the investigation of a condition indicator to be used for a bearing. Reliability centered maintenance is implemented from the findings of reliability failure analysis. Reliability centered maintenance is implemented through either condition based maintenance or time-directed maintenance. Reliability failure analysis is performed through the inspection of a failed component either from failures in the system in use or from controlled laboratory experiments. This paper details the design and set up of a mechanical test bed used to demonstrate reliability failure analysis for the determination of condition based maintenance. The test bed consists of an electric motor driving a loaded shaft with a bearing as the test article. The load on the shaft is supplied by a screw jack and monitored by a load cell. A two factor, two level experiment with three replications is run. The two factors are load and rpm. The test is run above and below the load ratings for the bearing at high and low rpm. Each of the tests was run for twenty four hours or until bearing failure. The temperature and vibration of the test bearing was monitored throughout the duration of each test, and the bearings are characterized for wear at the completion of the test. A failure model with hazard function is presented and evaluated.

Copyright © 2011 by ASME
Topics: Maintenance



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