Transactions of Materials and Heat Treatment

Title：Modeling and optimal control of couple leveling system for die forging hydraulic press

Authors： Yang Shuo Wu Aiguo Li Changbin Zhang Jin

Unit： Tianjin University

KeyWords： 200 MN die forging hydraulic press couple leveling system double-loop control

ClassificationCode：TG315

year,vol(issue):pagenumber：2014,39(3):76-82

Abstract：

Through analyzing the couple leveling method for 200 MN die forging hydraulic press, the nonlinear mathematical model of couple leveling system for forging hydraulic press was established. A new control strategy using the combination of optimal control of linear quadratic type and feedback linearization method was presented based on the nonlinear and uncertain disturbance structure characteristic of model. And the disturbance estimator was designed to overcome the disturbance and realize synchronous control of hydraulic cylinder. Simulation results show that the proposed double-loop control strategy is better than the traditional proportional-integral-derivative control method with higher leveling speed and accuracy which can improve the quality of forging in order to lower rejection rate, and provide a theoretical basis for leveling control during the actual machining process.

Funds：

国家科技重大专项资助项目（2009ZX04004-031）

Reference：

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