Convergence Time Decreasing of Extremum Seeking Control in a Distillation Column

https://doi.org/10.58571/CNCA.AMCA.2025.076

Resumen: In this work, the convergence time of the Extremum Seeking Control applied to ensure the optimal performance of a distillation column is studied and diminished in such a way that it is comparable to the one of a linear PI controller. The distillation column is one of the trays in continuous operation that separates an ideal binary mixture. Firstly, a sensitive-type analysis of the convergence time with respect to the ESC tuning parameters is carried out, locating the values for which the convergence time is minimum; next, a variation of the ESC is applied, which consists of the addition of a decreasing function to initially speed up the ESC performance, and a saturation block is also added to constrain likely large changes in the control inputs. The control problem is one of regulation, for which, for validation purposes, the optimal conditions for the testing cases are determined by a conventional sensitivity analysis of the output with respect to the inputs. The testing runs show not only the effectiveness of the ESC but also that the modified ESC has a reduced convergence time compared to the typical ESC, and it is even comparable to that of a linear PI controller.

¿Cómo citar?

Rionda Tanda, A., Hernández Escoto, H. & Hernández, S. (2025). Convergence Time Decreasing of Extremum Seeking Control in a Distillation Column. Memorias del Congreso Nacional de Control Automático 2025, pp. 445-450. https://doi.org/10.58571/CNCA.AMCA.2025.076

Palabras clave

Extremum Seeking Control, Black Box Model, Regulatory Control, Distillation Column, Aspen Dynamics, Optimizing parameters, PI Controller.

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