Research of experimental logistics system based on Controlled Petri Net

With the complication of the control system ,conventional methods are not able to describe the discrete event system (DES) perfectly .So the article defines a kind of Controlled Petri Net(CPN), discusses the methods of conflict resolution in detail .Considering the characters of the experimental logistics system ,which contains quite many controlled points and relatively complicated control process ,CPN technique is used to model the system ,which could not only resolve a series of coordination , competition and subsequent events existed in the system perfectly but also avoid conflicts effectively .At the same time, a programmable logic controller (PLC) is also used to practice control and validate the validity and reliability of the CPN model of the system.