Title: Derivative adaptive predictive control for a tempering process

Authors: Daniel Viúdez-Moreiras; Juan M. Martín Sánchez; Santiago Morant Artés

Addresses: Department of Electric, Electronic and Control Engineering, ETSII, UNED, Juan del Rosal St., 14, 28040 Madrid, Spain ' ADEX SL, Cardenal Herrera Oria Av., 298, 28035 Madrid, Spain ' Chocolates Valor S.A., Pianista Gonzalo Soriano, 03570, Villajollosa, Alicante, Spain

Abstract: The modelling threshold problem made hard the adaptive predictive (AP/ADEX) controllers implementation in processes that, due to their dynamics behaviour, require a control period below a certain value. However, a new concept named 'guidance system for derivative control' (GS), originally developed for the aerospace sector, and overcomes this problem. This paper presents the first industrial application from this new concept, applied to an illustrative industrial tempering process, characterised by a multivariable, highly nonlinear and time-varying dynamics. Thus, the new design is based on adaptive predictive expert (ADEX) control, and extended with a new concept, the guidance block, required to overcome the ADEX methodology restrictions when it has to be applied with reduced control periods in order to deal satisfactorily with high disturbances and nonlinear dynamics. This paper also presents a comparison between the new control system and the conventional control system (LCS), previously implemented in this industry and based on PID methodology, showing the benefits of implementing the new system.

Keywords: optimised adaptive control; predictive control; adaptive predictive control; derivative control; guidance system; process control; tempering process.

DOI: 10.1504/IJAAC.2019.098217

International Journal of Automation and Control, 2019 Vol.13 No.2, pp.243 - 262

Received: 05 Nov 2016
Accepted: 20 Sep 2017
Published online: 06 Mar 2019 *

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