基于状态反馈的锻造加热炉温度控制方法  

Temperature control method on forging heating furnace based on state feedback

作　　者：李中望[1,2] 余云飞 徐琬婷[1] Li Zhongwang;Yu Yunfei;Xu Wanting(Department of Electrical Engineering,Wuhu Institute of Technology,Wuhu 241006,China;Research Center for Complex Systems and Network Sciences,Southeast University,Nanjing 210096,China)

机构地区：[1]芜湖职业技术学院电气工程学院,安徽芜湖241006 [2]东南大学复杂系统与网络科学研究中心,江苏南京210096

出　　处：《锻压技术》2021年第7期124-129,共6页Forging & Stamping Technology

基　　金：安徽省2017年度高校优秀青年人才支持计划重点项目(gxyqZD2017140);芜湖职业技术学院2018年度科技创新团队建设项目(Wzykj2018A03);安徽省2018年度高水平专业建设项目(2018ylzy157);安徽省高校自然科学研究重点项目(KJ2020A0911,KJ2019A0974)。

摘　　要：锻造加热炉是锻压技术领域的重要设备,在加热过程中要求锻件的内外温度均匀,否则会形成内外温度差,从而在锻件内部产生应力,导致锻件缺陷。针对锻造加热炉的炉温,引入状态反馈控制,分析了某炉温状态反馈控制系统在满足性能指标时控制器最大输出超过最大允许值的情况,并通过适当地延长调节时间,有效地降低了系统控制器的输出。同时,通过在系统中设置全阶状态观测器,对估计模型与实际系统之间的误差进行补偿,提高了系统精度,并提出了去滞后的方法和思路,通过仿真进行了锻造加热炉温控系统去掉纯滞后的前后对比,得到了变换后系统与变换前系统间的相对作用强度为0.6775,体现出较好的替代性能。Forging heating furnace is an important equipment in the field of forging and stamping technology.In the heating process,the internal and external temperatures of forgings are required to be uniform,otherwise the temperature difference between the internal and ex-ternal temperatures is formed,which generates the stress inside the forgings to cause the defects.Therefore,for the furnace temperature of the forging heating furnace,the state feedback control was introduced,and the situation that the maximum output of the controller excee-ded the maximum allowable value when the performance indicators were met for a furnace temperature state feedback control system was analyzed.Then,the output of the system controller was effectively reduced by appropriately extending the regulating time.At the same time,a full-order state observer was set in the system to compensate the error between the estimated model and the actual system to improve the system accuracy.Furthermore,the method and idea of removing hysteresis were also put forward,and the temperature control system of forg-ing heating furnace before and after the pure hysteresis was removed was compared by simulation.Thus,the relative strength of interaction between the transformed system and the original system was obtained with 0.6775,which showed a better replacement performance.

关 键 词：锻造加热炉 温度控制 状态反馈 滞后性 全阶状态观测器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]