矫直机恒压力控制系统

提出了一种恒压力控制系统,此控制器在指定位置将位置控制切换为压力控制,同时利用压力前馈补偿实现矫直机的恒压力控制。针对电液压力控制系统具有一定的非线性、时变性和扰动力的影响,采用扰动力前馈补偿自抗扰控制策略,来减小内外扰动对矫直力的影响,提高矫直力的控制精度,实现恒压力矫直。通过Matlab软件和实验室全液压矫直机进行仿真以及实验验证,结果证明:矫直机恒压力控制器,抑制了内外扰动对压下系统系统的影响,实现了恒矫直力控制,提高系统稳定性以及系统的自我保护。

The constant pressure control system for the hydraulic system of the leveler

For medium plate leveler, the constant pressure control can improve the quality and precision of the plates, at the same time, the rack can be protected. A constant pressure control system is put forward for the screw down system of the leveler, which converts the position control system to the pressure control system at a specific point. For the characteristics of nonlinearity, time varying and disturbance of the hydraulic system of levelers, the control strategy of auto disturbance rejection with disturbance feedforward is adopted, which can reduce the influences of disturbance forces on the straightening force, improving the control precision of the straightening force and achieving constant pressure control. This control strategy is verified by the Matlab simulation and the hydraulic leveler prototype. The results indicate that the influences of disturbance force are brought down and the stability of the leveler hydraulic system is significantly improved.