Title Optimization and Cascade Robust Temperature Control of a Refrigerated Chamber
Authors BEJARANO PELLICER, GUILLERMO, Rodriguez, David , Alfaya, Jose A. , Gil, Juan D. , Ortega, Manuel G.
External publication Si
Means IFAC-PapersOnLine
Scope Proceedings Paper
Nature Científica
SJR Quartile 3
SJR Impact 0.29800
Publication date 01/01/2018
ISI 000451094400019
DOI 10.1016/j.ifacol.2018.11.090
Abstract This paper addresses the temperature control of a refrigerated chamber, using a vapour compression refrigeration system. A cascade control strategy is proposed, where the outer controller regulates the chamber temperature by generating a reference on the cooling power to be satisfied by the inner controller, which manipulates the actual manipulated variables: the compressor speed and the expansion valve opening. Since two control variables are available to satisfy only a certain cooling demand, energy efficiency is addressed to generate the required cooling power as efficiently as possible. A simple decoupling strategy is applied to reduce the high coupling between both controlled variables, while the PID parameters are calculated applying affine parameterisation and considering a certain condition for robust stability. The performance of the proposed control strategy is evaluated in simulation, concerning reference tracking and disturbance rejection. (C) 2018, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.
Keywords Vapour-compression refrigeration; Cascade control; Optimization; Uncertain linear systems; Decoupling; Robust stability
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