Study And Application Of Variable Universe Fuzzy Control In The Control Systems Based On Ethernet Model

This paper is presented as five sections. In the first place, the policy module in the model of fieldbus control network based on Ethernet has been studied.In the second place, a new-type function of contraction-expansion factor is established in this paper, which can be realized easily by C++ to optimize the controller of complicated industrial control system. Fuzzy control is one of intelligent control methods which is based on fuzzy theory and interpolation mechanism, so the structure analysis of typical fuzzy controller can offer important guidance for fuzzy controller design. In the third place, the algorithm module with new contraction-expansion factor is applied successfully in Matlab and experiment, whose results show that algorithm module is reasonable, adaptive and feasible. At last, the characteristics of new algorithm module are concluded as follows: firstly, the new contraction-expansion factor is complete, and the capabilities are favorable. Secondly, the algorithm module can be realized easily by C++ which support some methods by using VC++ accomplish control system. Thirdly, the algorithm module can be used in a lot of plants through adjusting parameters. Fourthly, the algorithm module can be used in fieldbus control system. Finally, computer use short time to run this algorithm module, and the system that has this algorithm module can overcome the disadvantages in conventional fuzzy controller and has high robustness.