01_IMechE_ModCompSys_LM,JBD&JDA.pdf (280.08 kB)
Download fileMaintenance modelling for computer-based systems
journal contribution
posted on 2008-10-30, 10:20 authored by Leila Meshkat, Joanne Bechta Dugan, J.D. AndrewsA framework is presented for incorporating maintenance into a dependability analysis
methodology for computer-based systems. Two types of maintenance are considered: failure-driven
maintenance and time-driven maintenance. Failure-driven maintenance or repair is carried out when the
system (or component) performance deviates from its expected performance and consists of all tasks
performed to restore the functional capabilities of failed items, principally diagnosis and repair. Timedriven
or scheduled maintenance is conducted on a speci c time schedule in order to prevent system
failure.
There may be dependencies between different components of a system with regard to their
maintenance plans. These dependencies arise either because a component has maintenance priority over
one or more components or because the maintenance of a certain component implies the maintenance of
other components. Constructs are presented for modelling these dependencies in the context of dynamic
fault tree analysis and a methodology is developed for solving the fault tree. The dynamic fault tree
constructs effectively capture the failure dependencies between components. The approach is illustrated
with an example based on a water deluge system.
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School
- Aeronautical, Automotive, Chemical and Materials Engineering
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- Aeronautical and Automotive Engineering