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          Institute: MPI für Dynamik komplexer technischer Systeme     Collection: Process Synthesis and Process Dynamics     Display Documents

ID: 125063.0, MPI für Dynamik komplexer technischer Systeme / Process Synthesis and Process Dynamics
Nonlinear control of a reactive distillation column
Authors:Grüner, S.; Mohl, K. D.; Kienle, A.; Gilles, E. D.; Fernholz, G.; Friedrich, M.
Date of Publication (YYYY-MM-DD):2003
Title of Journal:Control Engineering Practice
Start Page:915
End Page:925
Review Status:not specified
Audience:Experts Only
Intended Educational Use:No
Abstract / Description:Control of reactive distillation columns is a challenging task due to the complex dynamics arising from the coupling of reaction and separation. In this paper, asymptotically exact input/output-linearization is applied in simulation studies to an industrial reactive distillation column which is operated by Bayer AG. The resulting control law is rather general and can be easily adopted for other reactive distillation columns. This control scheme requires knowledge of the complete state of the process and therefore an observer is designed. Asymptotically exact input/output-linearization inherits robust stability from a robust observer. It is intuitively argued that the proposed observer is robust w.r.t. both model structure and parameter errors. In order to compensate for steady state observer offsets an outer control loop with simple PI-controlers is implemented. Simulation studies evidence that in comparison with a well-tuned linear controller the nonlinear controler shows superior performance with respect to setpoint changes and disturbances, even in the presence of unknown input delays.
External Publication Status:published
Document Type:Article
Communicated by:Achim Kienle
Affiliations:MPI für Dynamik komplexer technischer Systeme/Process Synthesis and Process Dynamics
MPI für Dynamik komplexer technischer Systeme/Systems Biology
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