Giant Forging Hydraulic Press Is Active And Synchronized Control System

Giant forging presses can be used to produce large-scale productions of light metal alloys, and also can be used to produce other ferrous metal forgings such as a variety of steel with low plasticity and high strength, heat-resistant steel and carbon steel and low-alloy steel and so on. It has a vital role in the production of forging of large-scale in defense and aviation industries. According to the effects of the hydraulic system's non-linearity, time variant, multi-cylinder sports cross-couple, the eccentricity produced by the non-symmetry of the processing of parts, as well as the active beams and framework can not have absolute rigidity, which easily occur elastic deformation and the power flow transmission distortion and so on, these lead to beam tilt during operation, affect the machining accuracy of parts. In the past, a large forging machines are used a passive sync correction system under the four corners of the active beams, which not only increase the cost of maintenance of equipment development, and some special hydraulic can not arrange passive synchronization system due to the problems of structural and spatial dimensions.This close connection with the large hydraulic press forging the practical application of synchronization control issue, which is based on active multi-point-driven synchronous control program, and launched a theoretical and experimental research, and Its main contents include the following:1,The Designed a giant hydraulic press forging multi-point-driven active sync control system; establishment of activity-beams centered multiple-input multiple-output mathematical model; made to ensure good control performance of the modern press intelligent control strategies.2,Studied the giant die forging hydraulic press control system for active multi-channel synchronous decoupling control strategy. Simulation studies have shown that after decoupling the system parameters and volatility of inhibition is not strong, when the system is complex and changing working conditions, the load range is large, should not rely on accurate mathematical model using the decoupling algorithm. 3,In order to solve nonlinear parametric effects of fluctuations on the system design of active synchronous control system robust controller. Simulation studies show that the control strategy can effectively regulate the system synchronization error, and fluctuations in system parameters and strong inhibition.4, Central South University,315T hydraulic machine to build experimental platform, based on active sync control program, using robust regulator control of a specific laboratory tests; Experimental results show that the robust regulator proposed in this paper allows the system to achieve various performance targets and requirements.