Computer-aided Synthesis of Fault-trees

Lapp, Steven A.; Powers, Gary J.

doi:10.1109/tr.1977.5215060

Cited by 278 publications

(108 citation statements)

References 3 publications

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“…The automatic construction of Fault trees has received the most attention, using a variety of methods. The most commonly used approaches to generate Fault Trees include diagraphs [1] , decision tables [2] , transition tables [3] and mini fault trees [4] . All these approaches have some form of restriction on their application and so no one method can be applied to all systems.…”

Section: Introductionmentioning

confidence: 99%

Application of a Reliability Model Generator to a Pressure Tank System

Stockwell¹,

Dunnett

2013

Int. J. Autom. Comput.

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Section: Introductionmentioning

confidence: 99%

Application of a Reliability Model Generator to a Pressure Tank System

Stockwell¹,

Dunnett

2013

Int. J. Autom. Comput.

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“…Decision tables are considered to be flexible modelling tool [3] but they are limited by an inability to consider a system's global behaviour [4]. The digraph technique, proposed by Lapp and Powers [5], models a system using the process variables present within the system, the relationships between them and the respective influences on the variables from within and outside the system. While this allows detailed system models to be produced, the technique is limited by its lack of flexibility, issues with two-way flow and is not suited for application to phased mission systems [4] [6].…”

Section: Introductionmentioning

confidence: 99%

A Petri Net Approach to Fault Verification in Phased Mission Systems using the Standard Deviation Technique

Lloyd

Andrews

Remenyte‐Prescott

et al. 2012

Quality & Reliability Eng

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Health management systems are now standard aspects of complex systems. They monitor the behaviour of components and sub-systems and in the event of unexpected system behaviour diagnose faults that have occurred. Although this process should reduce system downtime it is known that health management systems can generate false faults that do not represent the actual state of the system and cause resources to be wasted. The authors propose a process to address this issue in which Petri nets are used to model complex systems. Faults reported on the system are simulated in the Petri net model to predict the resultant system behaviour. This behaviour is then compared to that from the actual system. Using the standard deviation technique the similarity of the system variables is assessed and the validity of the fault determined. The process has been automated and is tested through application to an experimental rig representing an aircraft fuel system. The success of the process to verify genuine faults and identify false faults in a multi-phase mission is demonstrated. A technique is also presented that is specific to tank leaks where depending on the location and size of the leak, the resulting symptoms will vary.

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“…2 We constructed a fault tree with the Top Event of "Insufficient Supply of Water in Storage Tanks and No Detection of Same in Bldg. 511."…”

Section: Introductionmentioning

confidence: 99%

Reliability Study On The Lawrence Livermore National Laboratory Water-supply System

Hasegawa¹,

Lambert²

1986

Fire Saf. Sci.

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We conducted a reliability analysis of the Mocho water-supply system for the Lawrence Livermore National Laboratory (LLNL) to determine if an adequate supply of water would be available in the event of a major fire. We used the digraph fault-tree approach for logic model generation. The initiating-enabling event interval reliability approach was used for a probabilistic evaluation of the Mocho system fault tree. In the event of a major fire, the Mocho system demand unavailability was calculated to be 3.6 x 10-4• We identified 16 single-component failures that would cause failure of the control loop wh ich monitors storage-tank level. These failures would go undetected by monitoring personnel at LLNL. Our recom mended changes would provide a redundant measurement of the tank level, resulting in a decrease of the predicted system unavailability by about a factor of 50.

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Computer-aided Synthesis of Fault-trees

Cited by 278 publications

References 3 publications

Application of a Reliability Model Generator to a Pressure Tank System

Application of a Reliability Model Generator to a Pressure Tank System

A Petri Net Approach to Fault Verification in Phased Mission Systems using the Standard Deviation Technique

Reliability Study On The Lawrence Livermore National Laboratory Water-supply System

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