High-precision Displacement-force Dual-variable Coupling Control Method for Bidirectional Hydraulic Press
To meet the demand for high-precision coupled control of displacement and force in the electro-hydraulic servo systems of bidirectional hydraulic press,a kind of separate meter in and meter out electro-hydraulic servo system for bidirectional hydraulic presses is designed.A corresponding mathematical model is established,revealing the physical laws of the displacement-force coupled control system based on linear loads.A decoupling method for displacement-force coupled control of the bidirectional hydraulic press is proposed,simulation analysis and experimental validation are conducted based on linear loads.The results show that once the system stabilizes,the maximum overshoot of force is 1.42％,the maximum overshoot of displacement is 0.8％,the standard deviation of the force closed-loop tracking error is 447.5 N,and the standard deviation of the displacement closed-loop tracking error is 0.037 mm.This method not only achieves the high-precision coupled control requirements of displacement and force for the bidirectional hydraulic press but also enhances the system's degrees of freedom,offering a new approach to the study of decoupling methods in the displacement-force coupled control.
bidirectional hydraulic presslinear loadseparate meter in and meter outdisplacement-force coupled controlhigh-precision
万方数据
维普
