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Sampled‐data feedback control of a binary distillation column
Author(s) -
Shunta J. P.,
Luyben W. L.
Publication year - 1972
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450500310
Subject(s) - setpoint , control theory (sociology) , fractionating column , binary number , tray , distillation , sampling (signal processing) , signal (programming language) , computer science , column (typography) , control system , pid controller , control (management) , mathematics , control engineering , engineering , temperature control , artificial intelligence , detector , chemistry , chromatography , arithmetic , mechanical engineering , telecommunications , electrical engineering , frame (networking) , programming language
The design of sampled‐data controllers for a binary distillation column was studied for several types of controllers and for various control tray locations, sampling rates and disturbances. Minimal prototype control was superior to continuous PI control under some conditions but, as expected, was only satisfactory for a specified disturbance. dual “A” control scheme that compensates for both setpoint and load disturbances was developed. Two separate algorithms are implemented simultaneously, one receiving its input signal from the setpoint and the other from the measured variable. Dual control is superior to continuous control, particularly when both disturbances are encountered at the same time, and is superior to the “switching” method proposed by Mosler et al.