High-speed The Salivation Unit Automatic Control System

High speed casting machine is a kind of complex mechanical equipment. High speed, intelligence and high accuracy is the direction of the development of high speed casting machine. The research object of this thesis is high speed casting machine. In order to construct its automatic control system, some interrelated control technologies have been researched, and relevant control system has been designed and developed. The main content of this paper are as follows:Firstly, fieldbus control system technology and monitoring and control software technology, which are two key techniques of automatic control system of high speed casting machine, have been researched. The control require characteristic of high speed casting machine has been analysed, mainly containing tension of machine and temperature characteristic of casting of roller. Based on the research above, the collectivity technology based on fieldbus has been put forward to construct the automatic control system of high speed casting machine.Secondly, in order to realize the invariable tension control of high speed casting machine, the pull and wind-up tension of high speed casting machine have been researched. The control of pull invariable tension has been put forward, the tension has been analysed, the system model has been established. Because of continuous changing of wind-up tension, and the accuracy model is hard to establish, fuzzy control arithmetic has been chosen to control the wind-up tension. At last, the computer simulation has been carried on by Simulink to validate its feasibility.Thirdly, the temperature characteristic of casting roller has been researched, which includes structure and analysis of casting roller, and mechanism analysis of casting process.According to the requirement of temperature control, the fuzzy-PID control arithmetic has been put forward and applied to the temperature control system of casting roller.Finally, the control system of high speed casting machine has been designed, including the determination of hardware, construction of control system and development of sofeware function of control system.