| The high-speed maglev train's Decentralized Control System is the backbone of the operation control system. It implements the operational command and train security protection. Decentralized Control System is one of the key subsystems, which has higher reliability and safety requirements.In the dissertation, on the base of the analyzing in Decentralized Control System's functions and structure, the Decentralized Control System was modeled by UML, and Decentralized Diagnosis Computer was conducted applied research in this modeling. Research is focus on the followings:Firstly, on the basis of the research of high-speed maglev train operation mechanism, the functional requirements of the Decentralized Control System were analyzed;Secondly, the detailed functions of Decentralized Control Computer and Decentralized Diagnosis Computer, which are two parts of the Decentralized Control System, were analyzed, and each sub-module was modeled by UML;Thirdly, the detailed functions of Decentralized Safety Computer,Decentralized Propulsion Shutoff and Decentralized Switch Model which have higher safety requirements in Decentralized Control System were analyzed, and also each sub-module was modeled by UML;Fourthly, the system was analyzed based on the UML modeling of it. The functions of various modules, the relationships between various modules and the optimization process in the realization stage were presented;Fifthly, in view of a complete train operation process, the tasks of Decentralized Control System which are to be executed and the sequence of those tasks in this process was analyzed; the communication between Decentralized Control System and Centralized Control System,Vehicle Control System and Propulsion Control System were analyzed. Based on this, the Decentralized Control System was modeled by UML as a whole, and Decentralized Diagnosis Computer was conducted applied research.
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