冷连轧设定控制系统综合优化研究

Research on Comprehensive Optimization of Tandem Cold Rolling Setting Control System

基于现阶段冷轧板形精度要求的提高、板形控制技术的发展与智能控制技术的进步,在传统冷连轧负荷分配研究基础上,提出板形板厚张力设定控制系统综合优化计算方法。对板厚、张力进行兼顾板形偏差最小、弯辊裕量最优及负荷平衡的多目标优化设计,对工作辊弯辊、中间辊弯辊以沿带钢全宽板形偏差最小为目标进行优化设计。优化计算采用具有良好全局和局部寻优能力的三种群粒子群差分进化算法(Three-populations particle swarm optimization and differential evolution algorithm,Thr_PSODE)。现场应用结果表明,通过设定控制系统综合优化对轧制规程、张力制度以及各板形调控手段的优化配置,在兼顾多个优化目标的同时充分挖掘轧机的板形调控能力,实现了对复杂模态的高次板形缺陷的有效控制,具有重要的研究价值与应用前景。

According to the enhancement of cold rolling shape control precision requirement,the development of shape control technology and the improvement of intelligent control technology,shape-thickness-tension comprehensive optimization of tandem cold rolling setting control system is proposed instead of traditional load distribution research.Thickness-tension optimization is executed by the integrated goal of minimum shape deviation,maximum bending force margin and load equalization.Work roll bending force and intermediate roll bending force are optimization designed by the target of minimum shape deviation along strip width.Then three-populations particle swarm optimization and differential evolution algorithm（Thr_PSODE） is developed and applied to the optimization design.It is proved by field application that by shape-thickness-tension comprehensive optimization of setting control system,rolling schedule,tension schedule and shape control methods are optimally allocated.On the basis of the balance between other optimization goals,high-order shape defects with complex modality are controlled effectively by the fully excavation of mill shape control capability.Consequently,expansive research and apply prospect is expected.