连铸拉速控制系统的自适应容错控制  

Adaptive fault-tolerant control of casting speed control system for continuous casting

作　　者：戚洪基 王志英[1] 陈明[2] QI Hongji;WANG Zhiying;CHEN Ming(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114000,China;School of Electronic and Information Engineering,University of Science and Technology Liaoning,Anshan 114000,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114000 [2]辽宁科技大学电子与信息工程学院,辽宁鞍山114000

出　　处：《冶金自动化》2023年第5期93-102,共10页Metallurgical Industry Automation

基　　金：国家自然科学基金区域联合重点项目(U21A20483)。

摘　　要：65Mn钢连铸过程中拉速的稳定控制对铸坯的质量和安全生产至关重要,目前的控制方案大都是通过分析总结过往的故障数据设计出新的控制策略,但无法对处于运行状态下的故障设备进行实时处理。本文提出的容错控制(fault-tolerant control,FTC)策略基于反步法和李雅普诺夫稳定性理论等,在传感器和执行器故障同时存在的情况下,可以实现实时处理系统中的故障,避免了故障导致的控制精度和产品质量下降的问题,进而提高了拉速系统在故障发生时的可靠性和准确性。在故障发生后,该方法仍能保证拉速系统保持半全局稳定,误差收敛到原点附近的一个小邻域,仿真算例验证了该控制策略的有效性。The stable control of casting speed in the continuous casting process of 65Mn steel is very important for the quality and safety of the casting billet.The current control scheme is to design a new control strategy by analyzing and summarizing the fault data in the past,but it is unable to deal with the fault equipment in the running state in real time.Based on the backstepping method and Lyapunov stability theory and so on,the fault-tolerant control(FTC)strategy proposed in this paper can realize real-time fault processing in the system under the condition of simultaneous sensor and actuator faults,avoid the problem of control accuracy and product quality decline caused by faults,and thus improve the reliability and accuracy of the casting speed system when faults occur.After the fault occurs,the method can still ensure the semi-global stability of the casting speed system,and the error converges to a small neighborhood near the origin.The simulation example verifies the effectiveness of the control strategy.

关 键 词：连铸 容错控制 65Mn 反步法 自适应控制 

分 类 号：TF777[冶金工程—钢铁冶金]