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On the tuning of predictive controllers: Impact of disturbances, constraints, and feedback structure
Author(s) -
Omell Benjamin P.,
Chmielewski Donald J.
Publication year - 2014
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14529
Subject(s) - weighting , constraint (computer aided design) , control theory (sociology) , model predictive control , computer science , constraint satisfaction , mathematical optimization , process (computing) , profit (economics) , controller (irrigation) , simple (philosophy) , control engineering , control (management) , mathematics , engineering , economics , artificial intelligence , epistemology , biology , probabilistic logic , operating system , medicine , geometry , agronomy , radiology , microeconomics , philosophy
The impact of problem formulation modifications on predictive controller tuning is investigated. First, the proposed tuning method is shown to adapt to disturbance characteristic changes and thus, takes full economic advantage of the scenario. The second topic concerns point‐wise‐in‐time constraints and the impact of constraint infeasibility. Specifically, we shift the tuning question from selection of nonintuitive weighting matrix parameters to that of a few key parameters and results in a rather intuitive trade‐off between expected profit and expected constraint violations. Finally, we show that simple modifications will allow for the consideration of various feedback structures, including computational delay and partial state information. The overall conclusions of the work are that the results of the automated algorithm will help build an intuitive understating of the dynamics of the process and ultimately result in a higher level trade‐off between profit and constraint observance. © 2014 American Institute of Chemical Engineers AIChE J , 60: 3473–3489, 2014