薄带钢冷连轧非稳态轧制过程厚度与张力控制研究.pdfVIP

薄带钢冷连轧非稳态轧制过程厚度与张力控制研究1 张晓峰 张清东 （北京科技大学机械工程学院，北京 100083 ） 摘 要 本文以冷连轧非稳态轧制阶段的厚度与张力控制问题为研究对象，揭示了非稳态轧制过程轧机与轧件的非 线性、不确定性摄动和各种随机干扰是造成非稳态轧制过程厚度以及张力控制困难的主要原因，研究提出了以系统 的鲁棒稳定性和鲁棒性能作为衡量非稳态轧制过程厚度与张力控制系统控制品质的指标，以此分析了某厂1420 极 薄带冷连轧机的厚度与张力控制系统。采用现代鲁棒控制理论对原有系统进行了优化，设计了相应的鲁棒控制器， 仿真结果表明，鲁棒控制系统具有更好的控制性能，能够较好的克服轧制过程中的不确定摄动和随机干扰。将理论 研究成果应用于实际生产，改善了1420 轧机启动过程的建张质量和张力控制稳定性，提高了生产效率，绩效明显。 关键词 冷连轧 非稳态轧制 厚度控制 张力控制 Gauge and Tension Control for Thin Strip in Unsteady State of Tandem Cold Rolling Mill Zhang Xiaofeng Zhang Qingdong (School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083) Abstract Studied on the issue of gauge and tension control in unsteady rolling stage, this paper reveals that the factors nonlinear between the mill and strip,uncertain perturbation and random disturbances are the main reasons caused the quality of gauge and tension control in unsteady state,puts forward the viewpoint that robust stability and robus performance are used as the measurements index of gauge and tension control ．Based on the viewpoint,gauge and tension control systems are analyzed in 1420 tandem cold rolling mill for ultra-thin strip ．Simulation results show that robus control system has better control property and greater ability to overcome uncertain perturbations and random disturbances after original systems are optimized according to modern robus control theory and new designed robus controller is introduced ．Process of tension establishment and control stability are improved,and production efficiency is significantly benefited ． Key words tandem cold rolling, unsteady state rolling, automatic gauge control, automatic tension control 板带钢轧制成材的工艺实现平台——宽带钢冷连轧机是冶金装备中大型化、连续化、自动化程度最高的 成套设备，是轧机中的“航母”，一直主要依靠引进。不论是核心技术