<b>Automated Fault Tree Synthesis using Frames </b>

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  • <b>フレームを用いたフォ一ルトツリー自動生成システム</b>
  • フレームを用いたフォールトツリー自動生成システム
  • フレーム オ モチイタ フォールトツリー ジドウ セイセイ システム

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Abstract

<p><tt>Fault tree analysis has been applied to probabilistic risk assessment for large-scale systems including chemicaI processing plants and nuclear power stations、The synthesis of fault trees is an extremely complex and time consuming process in the stage of analysis,This paper presents an algorithm for application of knowledge engineering to automated fault tree synthesis.The algorithm is implemented in computer programs written in Prolog. The plant$tructure(P and I diagram)is represented using </tt><tt>frames and inputted in computers as the plant specific lnformation.Operators which describe the ba8ic structure of fault trees for control loops(feedback and feedfQrward type control circuits and protective systems)are stored in the generic knowledge・base.Component mulfmction information is also stored ln the form of mini fau1 tree.</tt><tt>Fault trees are generated sequentially by searching the knowledge-base.According to the frames,operators are combined to form the top structure of fault trees, and tfees uder the top structure are developed using mini faulttrees. </tt><tt>A fault tree synthesis is demonstrated for a How control system using the proposed methodology.</tt></p>

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