title: Economic-oriented stochastic optimization in advanced process control of chemical processes.
abstract: Finding the optimal operating region of chemical processes is an inevitable step toward improving economic performance. Usually the optimal operating region is situated close to process constraints related to product quality or process safety requirements. Higher profit can be realized only by assuring a relatively low frequency of violation of these constraints. A multilevel stochastic optimization framework is proposed to determine the optimal setpoint values of control loops with respect to predetermined risk levels, uncertainties, and costs of violation of process constraints. The proposed framework is realized as direct search-type optimization of Monte-Carlo simulation of the controlled process. The concept is illustrated throughout by a well-known benchmark problem related to the control of a linear dynamical system and the model predictive control of a more complex nonlinear polymerization process.
authors.affiliation: Department of Process Engineering, University of Pannonia, Egyetem Street 10, 8200 Veszprém, Hungary.
authors.forename: László
authors.initials: L
authors.lastname: Dobos
authors.forename: András
authors.initials: A
authors.lastname: Király
authors.forename: János
authors.initials: J
authors.lastname: Abonyi
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D005246:Feedback; D006814:Hungary; D008956:Models, Chemical; D018803:Models, Economic; D015233:Models, Statistical; D013269:Stochastic Processes