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In this paper, receding horizon control of largescale sewage systems is addressed considering different modelling approaches, which include several inherent continuous/
discrete phenomena (overflows in sewers and tanks) and elements (weirs) in the system. This fact results in distinct behaviours depending on the dynamic state (flow/volume) of the network. These behaviours can not be neglected nor can be modelled by a pure linear representation. In order to take
into account these phenomena and elements for the design of the control strategy, a modelling approach based on piece-wise
linear functions (PWLF) is proposed and compared against a hybrid modelling approach previously reported by the authors. Control performance results and associated computation times considering both modelling approaches are compared by using a real case study based on the Barcelona sewer network.
Results have shown an important reduction in the computation time when the PWLF-based model is used, with an acceptable suboptimality level in the closed-loop system performance.
CitationOcampo-Martinez, C.; Puig, V. On modelling approaches for receding-horizon control design applied to large-scale sewage systems. A: IEEE Conference on Decision and Control. "48th IEEE Conference on Decision and Control and 28th Chinese Control Conference". Shangai: 2009, p. 8052-8058.
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