Prebake Aluminum Expert Fuzzy Control System

With the rapid development of the technology of computer and automation, and the demand of the product locale, the computer control system is widely used in the manufacture of aluminum electrolytic and the efficiency is improved and the life-span of the aluminum electrolytic cell is increased. These years People are trying to apply control arithmetic more advanced(such as adaptive control, fuzzy control and expert system etc),to perfect the aluminum electrolysis control. According to the 80KA prebaked aluminum electrolytic cell in our country and aiming at the best technology "Four Low One High" ,we designed an intelligent control system for aluminum electrolytic cell.Pre-baked aluminum electrolytic cell is a non-linear, multivariable and time-varying system, its model is uncertain. It is difficult to detect the alumina concentration, polar distance, temperature and mole ratio on-line, so we control pre-baked aluminum electrolytic cell by the method of intelligent control.Based on collecting of experience and knowledge of expert control, we summarize new control strategy. The control system for tank can finish independently mostly control functions. It can sample voltage and current online, control alumina content and regulate polar distance, analysis and report cell noise, predict the anode effect and warning with sound and light, keep watch on and control artificial schoolwork process. At the same time, the control system can communicate with monitoring computer buy CAN field bus. It can exchange data and receive parameters, which are tuned and optimized by monitoring computer. And this can make the control to the aluminum electrolytic cell more accurate and reliable.In order to make the system be more security, reliable and efficiency we take the distribute control system based on CAN field bus.This thesis discusses expert system and fuzzy control technology and its application control of aluminum electrolytic cell; And then explain the idea of design with realization of the system's software and hardware indetailed; at the same time, according to the of the manufacture characteristic of aluminum electrolytic, the thesis discusses the methods of anti-interference and security in control system.The work we do will gain huge economic benefits in manufacture of aluminum electrolytic. At the same time, it will promote the development of intelligent fuzzy control technology and its extensive application in industrial process control.