基于双闭环控制的动态调整模型在冷矫直机中的应用

Application of dynamic adjustment model based on double closed-loop control in the cold plate leveller

由于基于PID单闭环位置控制的模型会造成瞬间液压冲击,提出基于双闭环控制的动态调整模型,通过斜坡控制器控制PID调节器的设定值,使每个循环周期PID调节器的输入偏差较小,从而消除瞬间冲击,以达到保护液压管道、油缸和传感器的目的。试验数据表明,斜坡发生器设定值和实际值的偏差在0.20~0.35mm之间,系统具有良好的跟随性,且系统的超调量约为0.82%,满足现场生产要求。

Because based on PID single closed-loop position control model can lead to instantaneous hydraulic impact,a model of dynamic adjustment based on double closed loop control is proposed.Through ramp-function controller controls the input value of PID controller,makes each cycle of PID controller input deviation is small,thereby eliminating the instantaneous impact,to protect the hydraulic pipeline,oil cylinder and sensor.The experimental data show that the deviation between the set value of the ramp-function generator and the actual value is between 0.20-0.35 mm.The system has good tracking performance and the system overshoot is about 0.82%,which meets the requirements of production.