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Processes 2017, 5(1), 2; doi:10.3390/pr5010002

A Modifier-Adaptation Strategy towards Offset-Free Economic MPC

Department of Civil and Industrial Engineering, University of Pisa, Largo Lazzarino 2, 56126 Pisa, Italy
These authors contributed equally to this work.
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Academic Editor: Dominique Bonvin
Received: 16 November 2016 / Revised: 15 December 2016 / Accepted: 20 December 2016 / Published: 29 December 2016
(This article belongs to the Special Issue Real-Time Optimization)
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Abstract

We address in the paper the problem of designing an economic model predictive control (EMPC) algorithm that asymptotically achieves the optimal performance despite the presence of plant-model mismatch. To motivate the problem, we present an example of a continuous stirred tank reactor in which available EMPC and tracking model predictive control (MPC) algorithms do not reach the optimal steady state operation. We propose to use an offset-free disturbance model and to modify the target optimization problem with a correction term that is iteratively computed to enforce the necessary conditions of optimality in the presence of plant-model mismatch. Then, we show how the proposed formulation behaves on the motivating example, highlighting the role of the stage cost function used in the finite horizon MPC problem. View Full-Text
Keywords: model predictive control (MPC); real-time optimization (RTO); economic model predictive control (EMPC); modifier-adaptation model predictive control (MPC); real-time optimization (RTO); economic model predictive control (EMPC); modifier-adaptation
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Vaccari, M.; Pannocchia, G. A Modifier-Adaptation Strategy towards Offset-Free Economic MPC. Processes 2017, 5, 2.

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