高精度薄带材冷连轧过程智能优化控制
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摘要
带钢冷连轧控制是系统性极强、技术难度极大、精度要求极高的综合性技术,是保证冷轧带钢产品质量和生产效率的主要手段。东北大学自主开发了冷连轧全套自动化系统,涵盖了轧机主令控制、自动厚度控制、自动板形控制、物流跟踪、模型设定等功能,并研发了高精度数学模型、轧制规程多目标优化算法、加减速过程带钢厚度与张力补偿及轧制工艺优化等先进控制技术。所开发的系统已推广应用到多条冷连轧生产线中,现场应用表明,系统运行稳定,实现了0.17 mm极薄规格带钢高速稳定轧制,厚度偏差小于±2.5μm,板形标准差小于7 I。最后对轧制过程的智能化发展进行了展望。
Tandem cold rolling control is a comprehensive technology with strongly systemic feature, great technical difficulty and high precision requirements. It is the most effective control method to ensure the product quality and production efficiency of cold rolled strip. The integrated automatic control system for tandem cold rolling mill was developed by Northeastern University. The control system mainly included mill master control, automatic gauge control, automatic flatness control, coil tracking, model setup, etc. The advanced control technologies, including mathematical model with high accuracy, multi-objective optimization of rolling schedule, the high precision tension and thickness compensation strategy for acceleration and deceleration process, rolling technology optimization, were independently developed. The control system was applied to several tandem cold rolling mills. The application results show that the system operates stably. For ultrathin product of 0.17 mm in thickness, the thickness deviation and flatness standard deviation are less than ±2.5 μm and 7 I, respectively. Finally, the future intelligent development of rolling process was prospected.
Tandem cold rolling control is a comprehensive technology with strongly systemic feature, great technical difficulty and high precision requirements. It is the most effective control method to ensure the product quality and production efficiency of cold rolled strip. The integrated automatic control system for tandem cold rolling mill was developed by Northeastern University. The control system mainly included mill master control, automatic gauge control, automatic flatness control, coil tracking, model setup, etc. The advanced control technologies, including mathematical model with high accuracy, multi-objective optimization of rolling schedule, the high precision tension and thickness compensation strategy for acceleration and deceleration process, rolling technology optimization, were independently developed. The control system was applied to several tandem cold rolling mills. The application results show that the system operates stably. For ultrathin product of 0.17 mm in thickness, the thickness deviation and flatness standard deviation are less than ±2.5 μm and 7 I, respectively. Finally, the future intelligent development of rolling process was prospected.
引文
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[11] 张浩宇,张殿华,孙杰,等.冷连轧末机架厚度控制优化策略[J].轧钢,2013,30(6):50.(Zhang H Y,Zhang D H,Sun J,et al.Optimization strategy for thickness control of cold continuous rolling mill[J].Steel Rolling,2013,30(6):50.)
[12] 王鹏飞,张殿华,刘佳伟,等.冷轧板形测量值计算模型的研究与应用[J].机械工程学报,2011(4):58.(Wang P F,Zhang D H,Liu J W et al.Research and Application of cold rolled strip shape measurement value calculation mode[J].Journal of Mechanical Engineering,2011(4):58.)
[13] Yan Z,Bu H,Zhang D.Dynamic optimization model of flatness target curve based on hybrid intelligent algorithm[J].Steel Research International,2017,88(6):1600326.
[14] Chen S Z,Zhang X,Peng L G,et al.Multi-objective optimization of rolling schedule based on cost function for tandem cold mill[J].Journal of Central South University,2014,21(5):1733.
[15] 张殿华,陈树宗,孙杰,等.基于实测值置信度的冷连轧轧制力模型自适应[J].钢铁研究学报,2013,25(1):30.(Zhang D H,Chen S Z,Sun J,et al.Adaptive model of cold rolling force based on confidence level of measured data[J].Journal of Iron and Steel Research,2013,25(1):30.)
[16] 陈树宗,彭文,姬亚锋,等.基于目标函数的冷连轧轧制力模型参数自适应[J].东北大学学报:自然科学版,2013,34(8):1128.(Chen S Z,Peng W,Ji Y F,et al.Parameters adaptation of the rolling force model based on the objective function in tandem cold rolling[J].Journal of Northeastern University:Natural Science,2013,34(8):1128.)
[2] 王国栋.钢铁行业技术创新和发展方向[J].钢铁,2015,50(9):1.(Wang G D.Technology innovation and develop direction of iron and steel industry[J].Iron and Steel,2015,50(9):1.)
[3] 王定武.我国宽带钢冷轧机建设和发展概况[J].冶金管理,2014(8):56.(Wang D W.General situation of construction and development of broadband steel cold rolling mill in China[J].Metallurgical Management,2014(8):56.)
[4] Ataka M.Rolling technology and theory for the last 100 years:The contribution of theory to innovation in strip rolling technology[J].ISIJ International,2015,55(1):89.
[5] 矫志杰,赵启林,王军生,等.冷连轧机过程控制在线负荷分配方法[J].钢铁,2005,40(3):44.(Jiao Z J,Zhao Q L,Wang J S,et al.Load distribution method of online process control on tandem cold rolling mill[J].Iron and Steel,2005,40(3):44.)
[6] 张浩,矫志杰,刘翠红,等.唐钢冷连轧机过程控制系统[J].东北大学学报:自然科学版,2007,28(10):1381.(Zhang H,Jiao Z J,Liu C H,et al.Cold strip rolling mill process control system in Tanggang[J].Journal of Northeastern University:Natural Science,2007,28(10):1381.)
[7] 陈树宗,张殿华,刘印忠,等.唐钢1800mm五机架冷连轧机过程控制模型设定系统[J].中国冶金,2012,22(10):13.(Chen S Z,Zhang D H,Liu Y Z,et al.Process Model Setup System of 1800mm Five-Stand Tandem Cold Mill in Tangsteel[J].China Metallurgy,2012,22(10):13.)
[8] 张欣,张殿华,李旭,等.五机架带钢冷连轧机张力控制系统研究[J].轧钢,2013,30(4):47.(Zhang X,Zhang D H,Li X,et al.Research on tension control system of tandem cold rolling mill[J].Steel Rolling,2013,30(4):47.)
[9] 张殿华,张欣,李旭,等.基于Smith预估控制器的监控AGC在冷连轧机上的应用[J].钢铁研究学报,2011,23(12):60.(Zhang D H,Zhang X,Li X,et al.Application of monitoring AGC based on Smith predictive controller in cold tandem mill[J].Journal of Iron and Steel Research,2011,23(12):60.)
[10] 张浩宇,张殿华,孙杰,等.冷连轧厚度自动控制的速度修正策略[J].冶金自动化,2014,38(1):40.(Zhang H Y,Zhang D H,Sun J,et al.Speed correction strategy of automatic gauge control for tandem cold mill[J].Metallurgical Industry Automation,2014,38(1):40.)
[11] 张浩宇,张殿华,孙杰,等.冷连轧末机架厚度控制优化策略[J].轧钢,2013,30(6):50.(Zhang H Y,Zhang D H,Sun J,et al.Optimization strategy for thickness control of cold continuous rolling mill[J].Steel Rolling,2013,30(6):50.)
[12] 王鹏飞,张殿华,刘佳伟,等.冷轧板形测量值计算模型的研究与应用[J].机械工程学报,2011(4):58.(Wang P F,Zhang D H,Liu J W et al.Research and Application of cold rolled strip shape measurement value calculation mode[J].Journal of Mechanical Engineering,2011(4):58.)
[13] Yan Z,Bu H,Zhang D.Dynamic optimization model of flatness target curve based on hybrid intelligent algorithm[J].Steel Research International,2017,88(6):1600326.
[14] Chen S Z,Zhang X,Peng L G,et al.Multi-objective optimization of rolling schedule based on cost function for tandem cold mill[J].Journal of Central South University,2014,21(5):1733.
[15] 张殿华,陈树宗,孙杰,等.基于实测值置信度的冷连轧轧制力模型自适应[J].钢铁研究学报,2013,25(1):30.(Zhang D H,Chen S Z,Sun J,et al.Adaptive model of cold rolling force based on confidence level of measured data[J].Journal of Iron and Steel Research,2013,25(1):30.)
[16] 陈树宗,彭文,姬亚锋,等.基于目标函数的冷连轧轧制力模型参数自适应[J].东北大学学报:自然科学版,2013,34(8):1128.(Chen S Z,Peng W,Ji Y F,et al.Parameters adaptation of the rolling force model based on the objective function in tandem cold rolling[J].Journal of Northeastern University:Natural Science,2013,34(8):1128.)