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Vol. 172, Issue 6, June 2014, pp. 105-110




Virtual Gauging System for Hot Strip Mill

1 Zhang Fei, 1 Xiang Xiaofei, 1 Wang Binbin, 2 Ren Xiaohuai

1 Metallurgy Engineering Research Institute, University of Science and Technology Beijing, Beijing, 100083, China
2 National Engineering Research Center for Advanced Rolling, No. 30, Xueyuan Rd, Haidian District, Beijing, 100083, China

E-mail: zhfeicn@gmail.com


Received: 9 April 2014 /Accepted: 30 May 2014 /Published: 30 June 2014

Digital Sensors and Sensor Sysstems


Abstract: A modeling method of virtual gauging system based on kernel partial least squares (KPLS) was proposed. The C frame of a gauging system is only installed in the delivery side of a hot strip finishing mill, therefore serious delay will definitely occur, in order to reduce the delay effect, automatic gauge control (AGC) system of upstream finishing mill adopts indirect gauge measurement method by stretch formula, but because the stretch modulus is not easy to get, and stretch formula is only an approximate expression, this method does not effectively improve the quality of strip. KPLS is a promising regression method for tackling nonlinear problems. This paper adopts KPLS method for nonlinear feature extraction, Simulation and online results show that on the data sets employed KPLS achieves better results than PLS and some other KPLS, so a more accurate gauge value with less delay is provided for the AGC system of upstream finishing mill to get better gauge accuracy.


Keywords: Kernel method, Kernel partial least squares, Automatic gauge control, Hot strip mill, Thickness control.


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