A hierarchical approach to construct Petri nets for modeling the fault propagation mechanisms in sequential operations

Abstract A systematic procedure has been proposed to construct Petri nets for modeling the fault propagation behaviors in batch processes. In this work, a complete system model is organized according to a hierarchy of four levels, i.e. (1) the controller/operator; (2) the valves; (3) the process units; and (4) the sensors. Every component in this system model consists of two distinct elements. One is used to characterize the equipment states and the other the input–output relations. For the purpose of reducing model construction effort, the general structure of object-oriented abbreviations is also developed to represent the PN in a user-friendly format. The effectiveness and correctness of this approach have been successfully demonstrated with a number of practical examples.

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