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Mekhatronika, Avtomatizatsiya, Upravlenie, 2017, vol. 18, no. 6, pp. 415422
DOI: 10.17587/mau.18.415-422


Structure Synthesis of Twin-Roll Strip Casting Thermal Mode Predictive Control System

S. M. Andreev, pk_su@bk.ru, M. S. Galdin, galdin.mike@gmail.com, Nosov Magnitogorsk State Technical University, Magnitogorsk, 455000 Russian Federation

Corresponding author: Galdin Mikhail S., Postgraduate Student, Nosov Magnitogorsk State Technical University, Magnitogorsk, 455000 Russian Federation, e-mail: galdin.mike@gmail.com

Received on October 22, 2016
Accepted on November 9, 2016

Thermal mode strip casting control is challenging at the present because twin-roll strip casting is characterized by the large time delay and high dynamics with low inertances. Nonlinearity and complexity of the thermal mode mathematical model, distribution and hard limitation of technological parameters are also the technology specific features and all it has a negative impact on the control and stability of the casting process. Famous control systems don't fully allow ensure the implementation of given problems and need to be revised. Thermal mode control system development is the complex problem to date. Solution of this problem requires to use special systems based on the new control principles. Structural synthesis of model-based predictive control systems is created in this work. Distinctive features of the proposed structure control scheme are the command module application and its interaction with the monitoring and model setting modules, providing real-time optimization performance and checking used models conformity with the real casting conditions. The proposed control system allows to coordinate the casting and rolling processes temperature and speed modes. This system provides for the implementation of controlled rolling technology at twin-roll strip casting unit by obtaining the required mass-average temperature of the strip before rolling in dynamic modes of operation. On the basis of simulation results it was concluded that the proposed model-based predictive control system provides transient process stability and satisfactory temperature control accuracy with controllable and uncontrollable external influences and significant time delay caused by the strip movement from the casting mold to the hot-rolling stand.
Keywords: twin-roll strip casting, predictive control, mathematical modeling, model-based control

For citation:

Andreev S. M., Galdin M. S. Structure Synthesis of Twin-Roll Strip Casting Thermal Mode Predictive Control System, Mekhatronika, Avtomatizatsiya, Upravlenie, 2017, vol. 18, no. 6, pp. 415422.

DOI: 10.17587/mau.18.415-422

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