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On a graphical method for the selection of a maintenance technique
Linnaeus University, Faculty of Technology, Department of Mechanical Engineering.
(English)Manuscript (preprint) (Other academic)
Abstract [en]

In this paper a graphical method for the selection of a cost-effective monitoring technique is suggested. Also, a graphical method to estimate the level at which components should be replaced when using a cost-effective technique, i.e. threshold level, is proposed. These two methods are based on the concept of the Total Time on Test, TTT-plot on age and condition dependent replacement is discussed.

Keyword [en]
Age replacement policy, condition dependent replacement policy, cost-effective technique, Generalized Total Time on Test, GTTT-plots, threshold level, total Time on Test, TTT-plot.
National Category
Other Engineering and Technologies not elsewhere specified
Research subject
Technology (byts ev till Engineering)
Identifiers
URN: urn:nbn:se:lnu:diva-21468OAI: oai:DiVA.org:lnu-21468DiVA: diva2:549171
Available from: 2012-09-03 Created: 2012-09-03 Last updated: 2016-02-01Bibliographically approved
In thesis
1. Some problems on the selection of a condition based maintenance technique for mechanical systems
Open this publication in new window or tab >>Some problems on the selection of a condition based maintenance technique for mechanical systems
1990 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In the first paper we focused mainly on establishing a sequential method for the selection of a maintenance technique for mechanical systems. The selection problem is studied for the components having considerable consequences and a non-negligible failure intensity. Identification of these components based on their failure mechanisms and failure causes is discussed and a modified version of the usual Failure Modes, Effects and Criticality Analysis, FMECA is suggested. A cumulative sum chart is proposed to identify a replacement time. This is explained by way of two examples. In order to run cost per unit time is proposed. The selection of a maintenance technique based on the intrinsic information of monitoring parameters is introduced.

Ability of a monitoring parameter in predicting failures, can be described as a probability of failure in the future conditionally on the current value of a model monitoring parameter. Thus, the second paper is focused on introducing a model relating a condition dependent failure rate to a component condition. For the selection of a cost-effective technique a modified proportional hazards model, PHM, is proposed. The modified model is able to reveal the effect of observing monitoring parameters and operating conditions on failure rate function.

A graphical method, based on a Generalized Total Time on Test, a GTTT- plot, for the selection of a cost-effective technique is proposed in the third paper. Also, a graphical method to estimate the threshold level for a cost-effective technique based on the same concept is suggested. These methods are illustrated by way of an example.

Place, publisher, year, edition, pages
Linköping, sweden: University press, Linköping University, 1990. 23 p.
Series
Linköping Studies in Science and Techology, 248
National Category
Engineering and Technology
Research subject
Technology (byts ev till Engineering), Terotechnology
Identifiers
urn:nbn:se:lnu:diva-21361 (URN)
Supervisors
Available from: 2012-09-03 Created: 2012-08-30 Last updated: 2014-05-14Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
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More styles
Language
  • de-DE
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  • en-US
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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