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Title: Identification and predictive control of a multistage evaporator
Authors: Atuonwu, J.C.
Cao, Y.
Rangaiah, G.P. 
Tadé, M.O.
Keywords: Automatic differentiation
Multiple-effect evaporators
Nonlinear model predictive control
Nonlinear system identification
Recurrent neural networks
Issue Date: Dec-2010
Citation: Atuonwu, J.C., Cao, Y., Rangaiah, G.P., Tadé, M.O. (2010-12). Identification and predictive control of a multistage evaporator. Control Engineering Practice 18 (12) : 1418-1428. ScholarBank@NUS Repository.
Abstract: A recurrent neural network-based nonlinear model predictive control (NMPC) scheme in parallel with PI control loops is developed for a simulation model of an industrial-scale five-stage evaporator. Input-output data from system identification experiments are used in training the network using the Levenberg-Marquardt algorithm with automatic differentiation. The same optimization algorithm is used in predictive control of the plant. The scheme is tested with set-point tracking and disturbance rejection problems on the plant while control performance is compared with that of PI controllers, a simplified mechanistic model-based NMPC developed in previous work and a linear model predictive controller (LMPC). Results show significant improvements in control performance by the new parallel NMPC-PI control scheme. © 2010 Elsevier Ltd.
Source Title: Control Engineering Practice
ISSN: 09670661
DOI: 10.1016/j.conengprac.2010.08.002
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