| Vehicle performance test system, which belongs to multi-subjects crossing research area, is involved in many subjects such as automobile, mechanical manufacture, electronics, automation control and computer. It is difficult to model and analyze vehicle performance test system because of its complicated system structure and large scale. Petri Net is a kind of diagrammatic language, and has strong power of describing and analyzing complicated systems, it is a research tool for systems. It provides both modeling methods and analysis technologies.By utilizing the theories of Petri net and the object-oriented Petri Net, this dissertation discusses the theories and methods of vehicle scheduling and studies the modeling method and technology of vehicle scheduling in the vehicle performance test system. The main work of his dissertation are as follows:(1) The dissertation elaborates the characteristics, system structure of distributed network test and control system, and does detailed research and analysis on basic constitution, system structure, and the principle of work, which are the fundaments of vehicle modeling.(2) The dissertation discusses the basic characteristics and analysis methods of Petri Net, and introduces a model called OPNets, then educes the OOPN model of vehicle scheduling.(3) The dissertation establishes the vehicle scheduling model by using the theories and methods of object-oriented Petri Net. It abstracts the vehicle scheduling system and establishes the objects, the static and dynamic characteristics, the relationships of objects and behavior restraint.(4) The dissertation analyzes the vehicle scheduling model based on OOPN. It establishes the characteristic reachable tree of the net system, and analyzes the reachability and bound/safety of the net system.(5) The dissertation gives standard level realization of vehicle scheduling, analyzes the reflection relationship between Petri Net and UML, and realizes the vehicle scheduling by UML. |
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