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Title: Analysis of safety systems with on-demand and dynamic failure modes
Authors: Meshkat, Leila
Dugan, Joanne Bechta
Andrews, J.D.
Keywords: Dynamic fault trees
Safety systems
On-demand failure
Markov models
Issue Date: 2000
Publisher: © Institute of Electrical and Electronics Engineers (IEEE)
Citation: MESHKAT, L., DUGAN, J.B. and ANDREWS, J.D., 2000. Analysis of safety systems with on-demand and dynamic failure modes. IN: Proceedings of the Annual Reliability and Maintainablity Symposium, Los Angeles, 24th-27th January, pp. 14-22 [DOI:10.1109/RAMS.2000.816277]
Abstract: An approach for the reliability analysis of systems with on demand, and dynamic failure modes is presented. Safety systems such as sprinkler systems, or other protection systems are characterized by such failure behavior. They have support subsystems to start up the system on demand, and once they start running, they are prone to dynamic failure. Failure on demand requires an availability analysis of components (typically electromechanical components) which are required to start or support the safety system. Once the safety system is started, it is often reasonable to assume that these support components do not fail while running. Further, these support components may be tested and maintained periodically while not in active use. Dynamic failure refers to the failure while running (once started) of the active components of the safety system. These active components may be fault tolerant and utilize spares or other forms of redundancy, but are not maintainable while in use. In this paper we describe a simple yet powerful approach to combining the availability analysis of the static components with a reliability analysis of the dynamic components. This approach is explained using a hypothetical example sprinkler system, and applied to a water deluge system taken from the offshore industry. The approach is implemented in the fault tree analysis software package, Galileo
Description: This is a conference paper [© IEEE]. It is also available from: http://ieeexplore.ieee.org/ Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
URI: https://dspace.lboro.ac.uk/2134/3839
Appears in Collections:Conference Papers and Presentations (Aeronautical and Automotive Engineering)

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