TY - GEN
T1 - A set membership approach to oxygen transport modeling with unmodeled dynamics
AU - Ruiz, Fredy
AU - Sanchez, Fredy
AU - Arevalo, Hugo
AU - Almeciga-Diaz, Javier
AU - Rodriguez-Lopez, Alexander
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/12/2
Y1 - 2015/12/2
N2 - Dissolved oxygen concentration in a cultivation broth is an important variable for bioprocesses operation. The oxygen transfer from air to liquid is determined by the oxygen transfer coefficient, usually regulated by the air flow rate and agitation speed. However, many microscopic phenomena are involved in the oxygen transfer. In this paper, a deterministic estimation method for the oxygen transfer coefficient of a bioreactor is proposed. The inclusion of probe dynamics and assumptions of deterministic undermodeling errors improve estimation results when compared to classic least squares methods. The approach is based on Set Membership techniques, it allows the user to fix hard bounds on the effect of unmodeled dynamics and provides feasible coefficient intervals by means of convex optimization problems. Results from a laboratory-scale bioreactor show the effectiveness of the proposed scheme and its advantages over a least-squares solution.
AB - Dissolved oxygen concentration in a cultivation broth is an important variable for bioprocesses operation. The oxygen transfer from air to liquid is determined by the oxygen transfer coefficient, usually regulated by the air flow rate and agitation speed. However, many microscopic phenomena are involved in the oxygen transfer. In this paper, a deterministic estimation method for the oxygen transfer coefficient of a bioreactor is proposed. The inclusion of probe dynamics and assumptions of deterministic undermodeling errors improve estimation results when compared to classic least squares methods. The approach is based on Set Membership techniques, it allows the user to fix hard bounds on the effect of unmodeled dynamics and provides feasible coefficient intervals by means of convex optimization problems. Results from a laboratory-scale bioreactor show the effectiveness of the proposed scheme and its advantages over a least-squares solution.
UR - https://www.scopus.com/pages/publications/84960408899
UR - https://www.scopus.com/pages/publications/84960408899#tab=citedBy
U2 - 10.1109/CCAC.2015.7345189
DO - 10.1109/CCAC.2015.7345189
M3 - Conference contribution
AN - SCOPUS:84960408899
T3 - 2015 IEEE 2nd Colombian Conference on Automatic Control, CCAC 2015 - Conference Proceedings
BT - 2015 IEEE 2nd Colombian Conference on Automatic Control, CCAC 2015 - Conference Proceedings
A2 - Osorio, Gustavo Adolfo
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE Colombian Conference on Automatic Control, CCAC 2015
Y2 - 14 October 2015 through 16 October 2015
ER -