基于共轭梯度法辨识钢渣温度分布  

Identification Temperature Distribution of Steel Slag Based on Conjugate Gradient Method

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作  者:翟恒东[1] 李利民[1] 杨骏 霍玉峰 邓思洪 蒋麒麟 Zhai Hengdong;Li Limin;Yang Jun;Huo Yufeng;Deng Sihong;Jiang Qilin(MCC BaoSteel Technology Services Co.,Ltd.,Shanghai 200999;Key Laboratory of Metallurgical Equipment and Control Technology,Wuhan University of Science and Technology,Wuhan 430081;Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering,Wuhan University of Science and Technology,Wuhan 430081)

机构地区:[1]中冶宝钢技术服务有限公司,上海200999 [2]武汉科技大学冶金装备及其控制教育部重点实验室,湖北武汉430081 [3]武汉科技大学机械传动与制造工程湖北省重点实验室,湖北武汉430081

出  处:《冶金设备》2022年第2期1-8,共8页Metallurgical Equipment

摘  要:为提高钢渣回收效率,需要对渣罐内钢渣温度分布进行精确测量,传统的热电偶测温成本高且效率低下,而辐射测温无法满足精度要求。本文运用共轭梯度法(CGM),以局部测量壁温为输入值,对渣罐内钢渣的温度分布进行反演,并进行仿真实验,探讨初始值、测点数、测量偏差与测点位置等因素对反演结果的扰动效果。结果表明:初始猜测值越偏离于真实值,反演精度就越差,反演精度随着测点数目的增多而有所提高;测量标准差σ在相对的测量误差范围内对反演精度影响较小,但当误差进一步增大时,反演精度随之降低。当σ≤1.0℃时,共轭梯度法能获得符合实际的反演结果;测点位置对反演精度的干扰比较显著,反演结果因测点位置的不同而表现出较大差异。In order to improve the recovery efficiency of steel slag,it is necessary to accurately measure the temperature distribution of steel slag in the slag tank.The traditional thermocouple temperature measurement has high cost and low efficiency,while the radiation temperature measurement cannot meet the accuracy requirements.In this paper,the conjugate gradient method(CGM)is used to reverse the temperature distribution of the steel slag in the slag tank and explore the perturbation effect of the initial value,measurement number,measurement deviation and the inversion position.The results show that the more the initial guess value deviates from the real value,the worse the inversion accuracy increases with the number of measurement points;The measurement standard deviation has less impact on the inversion accuracy within the relative measurement error,but when the error increases further,the inversion accuracy decreases.At that time,the conjugate gradient method could obtain the actual inversion results;The inversion accuracy and the inversion results showed the measurement position.

关 键 词:渣罐 钢渣温度 共轭梯度法 反问题 

分 类 号:X757[环境科学与工程—环境工程] TK124[动力工程及工程热物理—工程热物理]

 

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