Abstract: To address the problems of enormous maintenance process modeling,
non-repeatability of maintenance procedure and complex relation in the current virtual
maintenance process, Training Join net (TJ net), a process modeling method——combining Petri
Net with Semantic Network, is presented. The upper of TJ net decomposes component structure
logically and clusters resources formally according to the size of the components based on
Semantic Network, and thus realizes logical connection of components. The lower part abstracts
some improved element model based on Petri Net and the transition and fire rules of Petri Net,
and thus improves the model universality and the efficiency of modeling. And it achieves property
state information sharing by the state-collection module., The TJ net has been validated by the
instance of virtual maintenance of aircraft electronic equipment in the virtual maintenance
platform.

Key words: virtual maintenance, process modeling, semantic network, Petri Net