Abstract
ABSTRACTPetri nets are powerful graphical and mathematical modelling tool for describing and studying various types of system. Petri nets can be used not only to express the static behaviours of logic operation such as logical relations between system components, but also to study the dynamic behaviours such as operating sequence, workflow, maintenance process, failure occurrence and concurrent activities of the system Petri net model has been developed for LHD motor-overheating problem. The study utilises the Petri net approach in the above problem to demonstrate failure analysis. Petri nets have been used to identify minimum cut sets finding, marking transfer, firing sequence, reachability tree and dynamic behaviour of machine failure. Fault propagates from basic place to top place. It is almost a rule that no equipment can breakdown without showing prior signal of malfunctioning. A model is formulated for fault detection and isolation.
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