巨型模锻液压机驱动与同步过程联合控制的研究
Research on Joint Control of Combined Drivers with Synchronization for Giant Forging Hydraulic Press

高性能复杂整体模锻件要求模锻液压机必须具备多缸同步以及稳定运行的能力,但巨大运动惯量、复杂多变的负载以及锻件材质不均、形状不对称导致该装备运行时极易出现速度不稳定和活动横梁倾斜现象。针对这一问题,在考虑液压机液压非线性与复杂多变负载的基础上,建立了模锻液压机整体运动模型,并提出了驱动与同步过程联合控制的方法。通过对驱动过程采用多因子自调整模糊控制,对同步过程采用模糊解耦控制,使系统不仅实现了锻压速度的平稳控制,同时也保证了系统的同步性能。最后通过仿真和实验验证了该控制的有效性,为控制大惯量模锻液压机平稳运行提供了理论基础与保证。
High-performanced and complex integral die forgings require the forging hydraulic press has the function of synchronous operation with multi-cylinder and stable operation. However, with the reason of the huge moving inertia, complex and variable load, non-uniform forging material and asymmetric in shape, the equipment extremely tends to be unstable in speed and its moving beam is also easy to tilt. In view of these problems, considering the hydraulic nonlinear and complex load, we establish a motion model for forging press. Meanwhile, a method of joint control of combined drivers with synchronization was proposed. With a multi-factor self-tuning fuzzy control to drive subsystem and a fuzzy decoupling control to the synchronization subsystem, the press can not only achieve a forging stable speed, but also has high-precision synchronization performance. At last, the system effectiveness has been verified via the simulation and experiment results. All these will provide with theoretical foundations and guarantees for the large inertia equipment's precise operation