Modeliranje procesa otkaza i održavanja primenom Petrijevih mreža

Abstract

U ovom radu daje se kratak pregled primene Petrijevih mreža u modeliranju analizi i simulaciji problema iz oblasti pouzdanosti, efektivnosti, rizika i održavanja sistema. Najpre se ukazuje na ograničenja metoda klasične teorije pouzdanosti u analizi dinamike otkaza i akcija održavanja u realnim sistemima. Zatim se izlažu osnovni pojmovi iz oblasti Petrijevih mreža i prikazuju neki rezultati saopšteni u javnim publikacijama o njihovim primenama i pouzdanosti. Na kraju se ukazuje na sopstvena istraživanja i rezultate u ovoj oblasti.

This paper presents a short review of Petri net capabilities and application in modeling, analysis and simulation of reliability, availability and risk problems. Reliability block diagram, fault tree analysis, event tree analysis and Markov chains are standard and powerful techniques in reliability theory and practice. However they suffer of serious disadvantage when system dynamics is considered. Petri nets, especially colored Petri nets may be considered as a universal tool for modeling, analysis and simulation of complex systems. Some results from graph theory are directly applicable for analyzing so called structural properties of the system. Event-driven simulation is used for analyzing behavioral properties. Although Petri nets are more complicated than the standard reliability techniques they enable a richer insight in system behavior and becomes an important element of education for reliability engineers and risk analysts.