基于改进的混沌PSO算法的钢坯坯壳厚度软测量  

Soft Sensing of Billet Shell Thickness Based on Improved Chaotic PSO Algorithm

作　　者：于洋 吴立豪 张凤奇 罗小川[3] 潘全科 庞新富 YU Yang;WU Li-hao;ZHANG Feng-qi;LUO Xiao-chuan;PAN Quan-ke;PANG Xin-fu(School of Automation,Shenyang Aerospace University,Shenyang 110136,China;School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200444,China;College of Information Science and Engineering,Northeastern University,Shenyang 110819,China;School of Automation,Shenyang Institute of Engineering,Shenyang 110136,China)

机构地区：[1]沈阳航空航天大学自动化学院,辽宁沈阳110136 [2]上海大学机电工程与自动化学院,上海200444 [3]东北大学信息科学与工程学院,辽宁沈阳110819 [4]沈阳工程学院自动化学院,辽宁沈阳110136

出　　处：《控制工程》2022年第4期581-586,610,共7页Control Engineering of China

基　　金：国家自然科学基金资助项目(61773269);辽宁省自然科学基金资助项目(2021-BS-189,2019-KF-03-08);辽宁省教育厅项目(JYT2020016);沈阳航空航天大学博士科研启动基金资助项目(18YB42)。

摘　　要：钢坯的质量受坯壳厚度的影响,坯壳厚度的实时监测可帮助二冷控制系统提供更好的水量设定值。但钢坯生产过程复杂,直接测量坯壳厚度的成本较高,并且实现困难。针对该问题,提出了基于钢坯二维热传导模型的软测量方法。二维热传导模型的边界条件是影响软测量精度的重要参数,因此基于钢坯表面温度测量值,建立辨识边界条件的优化模型,提出改进的混沌粒子群优化(PSO)算法。仿真实验验证了,改进的混沌PSO算法在收敛速度和收敛精度上得到了提高。基于校正的二维热传导模型得到的坯壳厚度与射钉实验值很接近,软测量精度提高了14.24%。The quality of billet is affected by the thickness of billet shell.Monitoring the thickness of billet shell in real time can help the secondary cooling control system to get proper setting value of water quantity.However,the billet production process is complex,and the method of measuring the thickness of billet shell directly is costly and difficult to realize.To solve the problems,a soft sensing method based on twodimensional heat transfer model of billet is proposed.The boundary condition of two-dimensional heat transfer model is an important parameter that affects the accuracy of the soft sensing method.Therefore,based on the measured value of billet surface temperature,an optimization model is established to identify the boundary condition,and an improved chaotic particle swarm optimization(PSO)algorithm is proposed.The simulation results show that the improved chaotic PSO algorithm improves the convergence speed and convergence accuracy.Based on the corrected two-dimensional heat transfer model,the value of billet shell thickness obtained by the soft sensing method is closed to that of the pin-shooting experiment,and the accuracy of soft sensing is improved by 14.24%.

关 键 词：PSO算法 热传导模型 坯壳厚度 射钉实验 软测量方法 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]