Tracking and Disturbance Rejection in the 13C Cryogenic Separation Column
- Authors
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Cristina Ioana Pop
Technical University of Cluj-Napoca, Department of Automatic Control, 26-28 Gh. Baritiu Str., 400027, Cluj-Napoca
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Clement Festila
Technical University of Cluj-Napoca, Department of Automatic Control, 26-28 Gh. Baritiu Str., 400027, Cluj-Napoca
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Eva Henrietta Dulf
Technical University of Cluj-Napoca, Department of Automatic Control, 26-28 Gh. Baritiu Str., 400027, Cluj-Napoca
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Mihai Gligan
National Institute of Research and Development for Isotopes and Molecular Technologies 65-103 Donath Str., 400293 Cluj-Napoca, Romania
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- Abstract
- The separation of carbon isotopes represents a major research area due to the numerous uses of the least abundant carbon isotope, 13C. One of the methods used for separating these isotopes is the cryogenic distillation, in large counter-current columns. Such industrial plants represent a difficult problem in terms of automatic control, since they are characterized by nonlinearities, delay times and extremely severe control input constraints. The paper presents a simplified nonlinear model of the isotope separation process as well as the control strategy for tracking and disturbance rejection. The tracking problem is solved based on a multi-loop design with a modified feedback linearization technique as an inner loop controller and an outer robust controller. The disturbance rejection solution consists of a new feed-forward compensator, derived from the classical approach used in feedback linearization techniques. The resulting control strategy achieves robust stability and robust performance for a certain amount of model uncertainties.
- References
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- Published
- 2012-03-29
- Issue
- Vol. 14 No. 1 (2012)
- Section
- Articles