|
The heat distillation vacuum smelting furnace using advanced technology, a short process, low energy consumption, less pollution, and the equipment is relatively simple, high metal recovery advantages for the separation of binary alloy, is to develop new materials and non-ferrous metals smelting equipment. Since the seventies of last century invention has been successful and widely used in non-ferrous metallurgy. However, due to the smelting process control technology is relatively backward, and low level of automation factors, has restricted the rapid development of the vacuum smelting furnace. Therefore, the study of how the advanced control theory applied to vacuum smelting Control, and state-of-the-art control technology in the actual project will be used in vacuum smelting process control system, will have a very important theoretical and practical significance. Vacuum smelting process temperature control there is a nonlinear, large time delay, poor control precision and difficulties in obtaining charged with the mathematical model of the object, the paper uses the variable universe \high-precision-PID controller using Matlab simulation modeling, performance indicators related to conventional Fuzzy-PID controller design through simulation analysis. New Fuzzy-PID controller is derived from the theoretically better control effect is obvious, has the advantages of fast response, almost no overshoot, but also improves the control precision. According to the process and control requirements, analyze the overall structure of the vacuum smelting furnace control system using state-of-the-art control technology to design a set of vacuum smelting furnace monitoring system. In the hardware configuration, the lower position machine selects Siemens S7-300 PLC programming data acquisition, conversion, control and fuzzy control module of the site electrical equipment operations and other functions. The host computer using the Siemens configuration software WinCC V6.0, remote real-time monitoring of the development of the configuration screen smelting process, parameter setting, alarm indicators and trend display. Finalization of the entire system hardware configuration, software configuration, and communication between the next-bit machine and program development. After several field overall system debugging, the final test is operating normally, the automatic control of the vacuum smelting process. Both from the theoretical analysis and comparison of the results or the actual debugging and running results showed that the use of advanced control theory and control technology to achieve a vacuum smelting furnace control requirements and to meet the functional requirements of a laboratory assistant in the vacuum smelting furnace process control system , and achieved good control effect. Finally, based on the the VB NET SQL 2000 database development platform, combined with the the WinCC V6.0 configuration software, the simultaneous development of the vacuum smelting furnace data analysis software. Data import, process analysis and condition query and other functions, and the results obtained are shown in different forms (table or curve), exported, printed or saved in different forms, for experiment data analysis needed to provide a great deal of help .
|