Dynamic scheduling of continuous casting machine with molten uncertainty constraint

宋余琴Song Yuqin

(安徽工业大学管理科学与工程学院  安徽 马鞍山 243032)

(School of Management Science and Engineering, Anhui University of Technology, Anhui Maanshan 243032)

摘要：在炼钢-连铸(SCC)生产过程中,最普遍的干扰就是连铸机的故障。现有连铸机故障的重分配模式缺乏对钢水不确定性的考虑,因此本文针对该问题,建立了考虑钢水等级及温度、因钢水不确定性导致的中间包寿命限制的调度模型。为在可承受计算时间内得到更高效率的解决方案,我们根据问题特点设计优化了NSGA-II算法，基于炉次状态设计多层编码,引入炉次重分配规则得到可行解。最后,在实际的生产数据上进行计算。实验表明,提出的炉次重分配规则对考虑钢水不确定性的连铸机故障的炼钢-连铸动态排产是有效的。

Abstract: The most common disturbance in the steelmaking-continuous casting (SCC) process is the failure of the continuous caster. The existing redistribution model for continuous caster failures lacks consideration of steel uncertainty, so this paper addresses this problem by developing a scheduling model that takes into account the steel grade and temperature, and the lifetime limitations of the intermediate ladle due to steel uncertainty. In order to obtain a more efficient solution within a tolerable computation time, the NSGA-II algorithm is designed and optimized according to the characteristics of the problem, a multi-layer code is designed based on the furnace states, and furnace redistribution rules are introduced to obtain a feasible solution. Finally, the calculations are carried out on actual production data. The experiments show that the proposed furnace redistribution rule is effective for dynamic steelmaking-continuous casting scheduling considering steel uncertainty for continuous caster failures.

关键词：钢水不确定性；连铸机故障；动态调度；多目标；NSGA-II

Keywords: Steel uncertainty; continuous casting failure; dynamic scheduling; multi-objective; NSGA-II