Study on the Conversion of Causality Diagram to Fault Tree
Liang Xin-yuan · Jisuanji fangzhen · 2005
Causality diagram is able to express complex causalities among all factors in complicated system, while Fault Tree Analysis (FTA) is a very popular technique for the dependability modeling and fault analysis. It is important to discuss the conversion of causality diagram to fault tree (FT) because it will extend the application of causality diagram and make for modeling of FT if causality diagram can be mapped into FT. An algorithm for converting causality diagram into fault tree is proposed in this paper after the concepts and symbols of causality diagram and fault tree are analyzed. The conversion can get FT about any event that can be analyzed by FTA, so some problems in causality diagram can be solved by FT. Supposing that connecting event in causality express necessary causality, causality diagram can be converted into fault tree including possible causality .Its result indicates that causality diagram can be converted into fault tree at some condition by mini causality tree, and causality diagram has a popular application foreground.