Nonlinear model predictive control of a multiscale thin film deposition process using artificial neural networks
Loading...
Date
2019-11-02
Authors
Kimaev, Grigoriy
Ricardez-Sandoval, Luis A.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The purpose of this study was to employ Artificial Neural Networks (ANNs) to develop data-driven models that would enable the shrinking horizon nonlinear model predictive control of a computationally intensive stochastic multiscale system. The system of choice was a simulation of thin film formation by chemical vapour deposition. Two ANNs were trained to estimate the system’s observables. The ANNs were subsequently employed in a shrinking horizon optimization scheme to obtain the optimal time-varying profiles of the manipulated variables that would meet the desired thin film properties at the end of the batch. The resulting profiles were validated using the stochastic multiscale system and a good agreement with the predictions of the ANNs was observed. Due to their observed computational efficiency, accuracy, and the ability to reject disturbances, the ANNs seem to be a promising approach for online optimization and control of computationally demanding multiscale process systems.
Description
The final publication is available at Elsevier via https://doi.org/10.1016/j.ces.2019.07.044. © 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords
nonlinear model predictive control, shrinking horizon optimization, multiscale stochastic system, machine learning, artificial neural network