Research On The Application Of Fieldbus Control Technology For Automobile Assembly Automation

This thesis is based on an automation transformation project in one assembly shop of ChongQing ChangAn automobile company. It makes certain research and really attains some achievements in the application of fieldbus and intelligent control technology for automobile assembly automation system. Its main contribution liasin the following: (1) It designs a transformation scheme for the project with PROFIBUS technology. Compared with traditional distributed control system(DCS), the scheme is analyzed for its function characters, economic rationality and superiority; (2) It designs a fuzzy governing scheme for the saving-energy operation of an automobile supply line in one assembly shop, with fuzzy control technology and fieldbus communication technology. By the MATLAB procedure, the simulation result shows that it brings remarkable economic benefit; (3) It designs a human-machine interface supervisory control system procedure for a 97# gasoline filling station in the assembly shop, with graphical control software-Kingview 6.0. The procedure has such characters as easy operation and management, friendly and visual interface, safety and so on. Moreover, it can be used for similar control system. As for how to design scientific, reasonable and practical process control human-machine interface, some reference and guiding design methods and principles are proposed in the thesis.The thesis is organized as follows: Chapter 1 gives a general explanation of fieldbus, provides fieldbus research directions. Chapter 2 analyzes PROFIBUS fundamental character and communication protocol. In chapter 3, a PROFIBUS transformation design scheme is presented for the automation project in one assembly shop of ChongQing ChangAn automobile company. Furthermore, a fuzzy governing scheme is designed for an automobile supply line, and the evaluation is done on the simulation result made by the MATLAB procedure. By the way, the characters and merits of the fuzzy control scheme in fieldbus control system are discussed. In chapter 4, the author discusses how to use graphicalcontrol software to design process control human-machine interface. A procedure for the human-machine interface supervisory control system of a 97# gasoline filling station is designed with graphical control software-Kingview 6.0. Some design methods are raised for human-machine interface supervisory control system procedure, and some design principles are presented for process control human-machine interface.