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Fernando Lima Degree: Ph.D., Chemical Engineering
Advisor:
Christos Georgakis
Research Project: Operability: A Tool to Design Non-Square Model Predictive Controllers (MPC)
Project Description:
In non-square control systems, with more outputs than inputs, it is impossible to control all measured variables at specific set points. As a consequence, many of the outputs are controlled within an interval. If the interval is chosen to be very narrow, there might be no solution for the available values of the input variables. On the other hand, if the interval for these output variables is quite wide, then the tightness of control achieved might not be satisfactory. The aim of this research project is to investigate a methodology for the proper design of such non-square controllers. This will be achieved by bringing into the controller design the concept of Operability developed by Vinson and Georgakis (2000). The proposed design methodology will be tested through a challenging industrial example. It will be implemented through a MPC framework as well as the one of DMCplusTM controller of AspenTech.
Reference: Vinson, D. R.; Georgakis, C. Journal of Process Control 2000, 10, 185-194.
Education & Experience:
B.S. in Chemical Engineering, 2003
University of Sao Paulo, Brazil
Funding:
ACS Petroleum Research Fund
Publications:
Lima, F. and C. Georgakis (2006).
Operability of Multivariable Non-Square
Systems. ADCHEM Proceedings,
989-994. Lima,
F. and C. Georgakis (2006). An
Operability-Based Methodology for the
Feasible Output Ranges in the Control of
Non-Square Systems. AIChE
Annual Meeting.
Lima, F. and
C. Georgakis (2005).
Issues on the Operability of Multivariable
Non-Square Systems. AIChE
Annual Meeting.
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Graduate Students:
Fernando Lima
Foteini Makrydaki
Praveen Prasanna
Lisa Schupmann
Sze Wing Wong |
