Transactions of Materials and Heat Treatment

Title：Heavy-duty forging hydraulic press synchronous control based on secondary controller

Authors： Pei Honglei Liu Gang Zhao Cuiping

Unit： Wuxi Vocational Institute of Arts & Technology

KeyWords： heavy-duty forging hydraulic press synchronous control secondary controller Lyapunov direct method control allocation

ClassificationCode：TP23

year,vol(issue):pagenumber：2019,44(1):118-122

Abstract：

To improve the synchronous control accuracy of heavy-duty forging hydraulic press, a secondary controller including inner ring pressure controller and outer ring position controller was designed, and a dynamic model of pressure for multi-cylinder single action hydraulic press and a dynamic model of sliding block location were built. For the inner ring pressure controller, the Lyapunov function was configured to calculate the control rate of oil chamber pressure. However, for the outer ring position controller, because the load of hydraulic system was uncertain, the adaptive control system with uncertain load was designed. Through constructing the Lyapunov function of location tracking subsystem, the adaptive control rate was solved, at the same time, the load value was estimated, and the adaptive control rate was transferred into pressure expected value of each oil chamber by controlling allocation method. The simulation verification shows that the designed secondary controller can evaluate the constant uncertain load error-freely and overcome high accuracy leveling within 1 s, and the leveling error is within 1.6×10-5 rad. Besides, the secondary controller can track sliding block location within 1 s, and the location tracking error is within 1.5×10-4 m.

Funds：

江苏省大学生创新创业训练计划项目(201713749001Y)

裴红蕾（1982-），女，硕士，讲师，E-mail：463400135@qq.com

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