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Design of decentralized IMC‐PID controller based on dRI analysis
Author(s) -
He MaoJun,
Cai WenJian,
Wu BingFang
Publication year - 2006
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.10994
Subject(s) - pid controller , control theory (sociology) , transfer function , internal model , controller (irrigation) , diagonal , control engineering , process (computing) , function (biology) , process control , engineering , computer science , control (management) , mathematics , temperature control , agronomy , geometry , electrical engineering , operating system , artificial intelligence , evolutionary biology , biology
A simple yet effective method for designing decentralized PID controller, which is based on dynamic interaction analysis and internal model control principle, is proposed. On the basis of structure decomposition, the dynamic relative interaction is defined and represented by the process model and controller explicitly. Using the initial controllers designed for the diagonal elements, the multiplicate model factor is derived, and then simplified to a pure time delay function at the neighborhood of each control loop critical frequency to obtain the equivalent transfer function for the particular control loop. Consequently, appropriate parameters of individual controller are determined by applying the IMC‐PID tuning rules for the equivalent‐transfer function. Simulation results for a variety of 2 × 2, 3 × 3 and 4 × 4 systems show that the design technique results better overall control performance than those of existing design methods. © 2006 American Institute of Chemical Engineers AIChE J, 2006