Model-Free Temperature Control of Heat Treatment Process

Andrei Baciu and Corneliu Lazar ()
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Andrei Baciu: Department of Automatic Control and Applied Informatics, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania
Corneliu Lazar: Department of Automatic Control and Applied Informatics, “Gheorghe Asachi” Technical University of Iasi, 700050 Iasi, Romania

Energies, 2024, vol. 17, issue 15, 1-21

Abstract: The heat treatment temperature must precisely meet the required profile to ensure the quality of the workpiece. The model of the heat treatment furnace is not precisely known because it is nonlinear and complex. Considering this aspect, model-free temperature control methods are proposed, which are not based on a model of the process, but only on the input and output data acquired from the control system. Since the controlled temperature must accurately track the reference formed by the ramp and soak signals in the presence of disturbances, model-free iPI controllers were chosen due to the included double-integral component that ensures the steady-state performance for ramp signals. For the tuning of the iPI controller parameters, the iterative feedback tuning method is proposed, and the performance is compared with that obtained using the sliding mode control iPI variant. The proposed iPI control laws are tested for ramp and soak scenarios, using temperature suitable to thermal treatment technological processes, and performance is analyzed using both process-specific indices and classical criteria.

Keywords: model-free control; iterative feedback tuning; sliding mode control; heating treatment process (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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