At present, beginning of studies about profile control done by domestic steel enterprises is later than others countries and most of equipments used in domestic steel enterprises were imported and in-depth studies about the design of equipments is relatively less. The design of domestic usually adopts analogism and this has lacked theoretical supports and has some demerits. Under the circumstances, taking the 900HC cold strip rolling mill as an object study, a research for the application of theory of the fuzzy neural network controller based on genetic algorithm (GA) has been made to the shape control in the hydraulic bending servo system.On basis of knowing about hydraulic bending roller control system and modeling methodologies and simulation and optimization of hydraulic servo system, this paper make use of theory analyzing and calculate and simulation. Through simplifying system's model reasonably, model suitable for practice was given. This model not only accurately embodied dynamic characteristics of this system, but also advantaged gaining accurate parameter of the system and all kinds of components. Meanwhile the model included non-linear elements that were simplified frequently, effects of disturbances and changes of control system adjustment ways. In aspect of model realization, modern simulation technique and software of calculation were applied adequately and system simulation has been realized through using dynamic structures of SIMULINK of Matlab software. Dynamic structures and mathematic model are corresponding and this way is useful to improve model. Through analyzing results of simulation, this paper find out the defects of hydraulic bending roller control system and tradition controllers. Under the circumstances, a Fuzzy Radial Basis Function (RBF) Neural Network controller based on Genetic Algorithm is designed. Application to the typical nonlinear system 900HC hydraulic bending roller system and compare to the PID, shows the controller be able to improve the static and dynamic performance of hydraulic bending roller control system and the precision of bending roller. At same time, it shows the controller has good performance and promise.
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