Optimal control systems is still relevant topic. In industries (especially in the range of metallurgy) that are primarily dependent on energy there are desirable either changes in technology and changes in existing technologies or changes of traditional materials for substituting ones or to explore possibilities for energy savings. Optimal control, as the term itself suggests, leads to savings on principle, even energies that are required to ensure these processes. The core is the optimal control model. That describes the behaviour of the controlled system. We try to summarize modern methods, for example using the principles of artificial intelligence and genetic algorithms, to balance the core of modules, which are used to optimize process control. The main focus will be concentrate on selected aggregates in rolling mill plants especially on continuous reheating furnaces.Keywords: heating, furnace, model, optimal control, simulation
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