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Controller design for integrating and runaway processes involving time delay
Author(s) -
Quinn Stanley B.,
Sanathanan C. K.
Publication year - 1989
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.690350605
Subject(s) - control theory (sociology) , cascade , process (computing) , computer science , controller (irrigation) , control engineering , stability (learning theory) , matching (statistics) , task (project management) , selection (genetic algorithm) , key (lock) , class (philosophy) , open loop controller , engineering , control (management) , closed loop , mathematics , systems engineering , agronomy , statistics , computer security , chemical engineering , artificial intelligence , machine learning , biology , operating system
This paper presents an efficient method for the design of controllers for integrating and runaway processes. The method is based on model matching in the frequency domain. The presence of open‐loop instability as well as pure time delay in the process models make the design task challenging for these classes of processes. The goal is to achieve low‐order, easily implementable cascade controllers in a unity‐output‐feedback configuration. It is shown that the central problem is in the selection of appropriate reference models. Several key constraints are developed which relate a given process model to a class of reference models for achieving total stability. Typical design examples are presented to clearly illustrate the various mathematical techniques.