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SUMMARY:Top down model of condition based maintenance for complex asset - 
 Zhenglin Liang
DTSTART:20120705T130000Z
DTEND:20120705T140000Z
UID:TALK37969@talks.cam.ac.uk
CONTACT:Rengarajan
DESCRIPTION:Following by the technology innovation\, lots of industrial as
 sets \ntend to multi-functional and highly integrated. This is scale up th
 e \ncomplexity of the asset. To keep the asset at high availability\, \nma
 intenance action is critical. Condition based maintenance is a \nmaintenan
 ce action based on health of asset which is provided from \ncondition moni
 toring. It can reduce unnecessary inspection and system \nshutdown. There 
 is a great interest in condition based maintenance from \nboth theoretical
  and industrial fields in the past 50 years. However\, \ncondition based m
 aintenance for complex system is still problematic\, \nespecially\, when t
 he system has severe fault propagation among their \nsubsystems. In this p
 aper\, a layered top down model is proposed to \nrepresent the asset as a 
 group of interdependent components. The top layer \nuses continue time Mar
 kov chain to calculate the optimal inspection \ninterval and maintenance t
 hreshold with considering accelerated \ndeterioration caused by fault prop
 agation. The down layer of the model \nanalyzes the fault propagation in c
 omponents and in turn calculates \ndeterioration rate of the accelerated d
 eterioration. This model provides a \ngood accuracy on modeling a complex 
 asset. In addition\, it overcomes the \nproblem of exponentially increased
  complexity with the number of components \nin the asset. The working case
  of the project is mainly on power \ntransformer.\n
LOCATION:Seminar 1\, Institute for Manufacturing\, 17 Charles Babbage Road
 \, Cambridge
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