放卷张力系统解耦控制器的设计

摘要

针对凹版印刷机放卷系统对张力控制稳定性的要求,提出了一种利用自抗扰控制( ADRC)技术来设计张力解耦控制器的新方法.根据放卷系统的工作机理,建立了放卷张力系统的非线性耦合数学模型,用ADRC方法推导了张力系统的解耦模型,得到了系统阶数和静态解耦模型.在放卷张力系统模型的基础上,利用ADRC技术对放卷系统的张力解耦控制器进行了设计.控制器内部鲁棒性和抗干扰性能的对比仿真结果表明,所设计的ADRC解耦控制器可以较好地实现系统的解耦,并具有比传统比例积分微分控制器更好的内部鲁棒性和抗干扰性.%A new decoupling controller based on a unique active disturbance rejection control (ADRC) strategy is presented to strengthen tension stability in unwinding system of gravure printing machine. A nonlinear model is established according to the unwinding system working principle, and a decoupling model is constructed to determine the system order and static decoupling part. Then following the decoupling model, an ADRC decoupling controller is designed to enhance the tension stability in the unwinding system. Simulation shows that the proposed tension controller is able to realize a decoupling control for unwinding system and endowed with better internal robustness and disturbance rejection than traditional proportional-integral-derivative controller in tension control.