Fuzzy Control Based On Industrial Ethernet And PLC

Needing to resolve nonliner,big lag,multivariate,uncertainty even rough but have no way to build model procedure of production control problem,to develop intelligent control is an effective and feasiable approach.As a object which control,temperature is used large scale in industrial production,temperature control system is a non-liner big lag system.PID can not supply ideal conclusion,Fuzzy control is a technology which have many successful and actual application,is a mature on theory. Some problem such as overshoot of system and response time can be resloved if we apply Fuzz control in temperature control system.At first,the basis and background in selecting this topic to research in the thesis were discussed in this paper. Then, the paper introduced the development condition and advantages and disadvantages of control network such as DCS and FCS, then introduced Industrial Ethernet, mainly introduced the protocol standard and function and communication model of Industrial Ethernet. The implementation process and construction plan about Industrial Ethernet based on Siemens S7-200 and S7-300 PLC were discussed, and complete communication expriment successfully .Researched the design process and steps such as Fuzzy pricese quantity,inquiry control chart,defuzzy based on two dimensional Fuzzy controller on the basis of introducing the basic principle and structure of Fuzzy control in detail. Simulated the Fuzzy control strategy by MATLAB,the simulation conclusion showed that the Fuzzy control strategy is fesible and effectivity. The influence of quantization factor and scale on system control perfermance is also researched in this paper.Implement Fuzzy control to temperature bu Siemens S7-200 CPU224 PLC based on industrial Ethernet platform on the basis of the preworks.The last, inadequacy of the system and development trendency were descripted about this temperature control system.