气动张力控制系统在放卷装置中的应用

为解决纸张放卷过程中断纸、跑偏等问题,将气动技术应用到纸张放卷装置中,开展了纸张恒张力控制过程分析,提出了采用气缸浮辊位移的变化来检测纸张中的张力变化的方法,结合变速积分PID控制算法,完成了对纸张的恒张力控制。设计了以MCS-51单片机为主控芯片,位移传感器为反馈环节,电控气动比例阀为执行机构的气动张力控制系统。系统运行结果表明,气缸浮辊位移变化能快速响应张力变化,具有稳定性好、位移偏差低、控制精度高、鲁棒性强等优点,对收放卷系统恒张力控制具有重要的借鉴意义。

Application of pneumatic tension control system for unreeling

In order to solve the problems of the broken paper and paper yaw, the pneumatic technology was investigated for unreeling. After the analysis of the control process of constant tension for the paper land, a method was presented to test the paper land tension through floating roll displacement variety for air cylinder, and achieve constant tension of the paper land with gearshift integral PID algorithm. Pneumatic tension control system was designed with MCS-51 single-chip microcomputer for main control chip, displacement sensor for feedback device and electricity-controlled pneumatic ratio valve for actuator. The running result of system shows that, the cylinder floating roll displacement can respond quickly to changes in tension, and it has good stability, low displacement deviation, high control precision, and strong robustness, so it has important reference meaning on constant tension control for reeling or unreeling.