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THE RPN METHODOLOGY APPLIED TO QUANTIFY PROCESS OPERABILITY AND CONTROLLER DESIGN
Jorge O. Trierweiler1 and Luciano A. Farina2
1 Laboratory of Process Control and Integration (LACIP)
Department of Chemical Engineering, Federal University of Rio Grande do Sul (UFRGS)
Rua Marechal Floriano, 501, CEP: 90020-061 – Porto Alegre – RS – BRAZIL,
http://www.enq.ufrgs.br/pessoal/jorge/, E-MAIL:jorge@enq.ufrgs.br
2 TriSolutions – Engineering Solutions
R. Washington Luiz, 675, CEP 90010-460 – Porto Alegre – RS – BRAZIL,
http://www.trisolutions.com.br/, E-MAIL: farina@trisolutions.com.br
The RPN indicates how potentially difficult it is for a given system to achieve the desired performance robustly. It reflects both the attainable performance of a system and its degree of directionality. Three new indices, RPN ratio, RPN difference, and relative RPN are introduced to quantify how realizable a given desired performance can be. The predictions made by RPN are verified by closed-loop simulations. These indices are applied to quantify the IO-controllability of the quadruple-tank process and an air separation plant.
Keywords: controllability measures, RPN, the quadruple-tank system, controller design, air separation plant
Session slot T-Mo-M14: Process Control/Area code 2a : Control Design
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