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| Parameter optimization of shape setting model and application of control technology |
| LI Bo-qun1， FAN Xuan1， LI Wei-hong1 ， ZHANG Da-qing1， FAN Chui-lin2 |
| 1. School of Electronic and Information Engineering， University of Science and Technology Liaoning， Anshan 114051， Liaoning， China； 2. Strip Hot Rolling Mill， Anshan Iron and Steel Co.， Ltd.，
Anshan 114001， Liaoning， China） |
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Abstract The shape set model is a very important part of the automatic shape control system，and it determines the accuracy of strip head profile and flatness. The shape precision is not only an important quality index in the hot strip rolling，but also decides the market competitiveness of the product. The shape control strategy has been a core technology in the hot strip mill，which is a hot topic for rolling research. The structure and function of the PC shape set control system are described about 1780ASP，whose parameters of hot roller crown model have been optimized. The feedback of the strip crown and flatness is introduced in model self-learning for standers，which can effectively improve the accuracy of the shape set model. Due to the non-linearity and time-varying of the practical rolling process，the traditional PID control is close to the limit. In order to further improve the control quality，the flatness feedback of the strip adopts the nonlinear PID control strategy，which has a wide range of parameters tuning and is easy to realize in engineering. The production data has shown that the shape control precision was improved after application of the optimization program.
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Received: 03 July 2018
Published: 15 February 2019
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2019, Vol. 54 
