Observer design for a class of MIMO nonlinear systems

M Farza, M M'Saad, L Rossignol - Automatica, 2004 - Elsevier
A simple observer is proposed for a large class of MIMO nonlinear systems which includes
many physical models. The main characteristic of the proposed observer lies in the easiness …

A hybrid artificial neural network as a software sensor for optimal control of a wastewater treatment process

DJ Choi, H Park - Water research, 2001 - Elsevier
For control and automation of biological treatment processes, lack of reliable on-line sensors
to measure water quality parameters is one of the most important problems to overcome …

Nonlinear adaptive control for bioreactors with unknown kinetics

L Mailleret, O Bernard, JP Steyer - Automatica, 2004 - Elsevier
We consider a control problem for a single bioreaction occurring in a continuous and well-
mixed bioreactor, assuming that the bioreaction's kinetics is not represented by a validated …

Continuous-discrete time observers for a class of MIMO nonlinear systems

M Farza, M M'Saad, ML Fall, E Pigeon… - … on Automatic Control, 2013 - ieeexplore.ieee.org
This technical note addresses the observer design problem for a class of continuous-time
dynamical systems with non-uniformly sampled measurements. More specifically, we …

Optimal operation of fed-batch fermentations via adaptive control of overflow metabolite

S Valentinotti, B Srinivasan, U Holmberg… - Control engineering …, 2003 - Elsevier
The maximization of biomass productivity in the fed-batch fermentation of Saccharomyces
cerevisiae is analyzed. Due to metabolic bottleneck, often attributed to limited oxygen …

Observer design for a class of uncertain nonlinear systems with sampled outputs—Application to the estimation of kinetic rates in bioreactors

I Bouraoui, M Farza, T Ménard, RB Abdennour… - Automatica, 2015 - Elsevier
A continuous–discrete time observer is proposed for a class of uncertain nonlinear systems
where the output is available only at non uniformly spaced sampling instants. The …

A robust sliding mode observer for non-linear uncertain biochemical systems

M Czyżniewski, R Łangowski - ISA transactions, 2022 - Elsevier
A problem of state estimation for a certain class of non-linear uncertain systems has been
addressed in this paper. In particular, a sliding mode observer has been derived to produce …

State estimation for a penicillin fed-batch process combining particle filtering methods with online and time delayed offline measurements

J Kager, C Herwig, IV Stelzer - Chemical Engineering Science, 2018 - Elsevier
Real time monitoring of physiological characteristics during a cultivation process is of great
importance in the pharmaceutical industry. Measuring biomass, product, substrate and …

Lipid production optimization and optimal control of heterotrophic microalgae fed-batch bioreactor

J Abdollahi, S Dubljevic - Chemical engineering science, 2012 - Elsevier
Interior point optimization and model predictive control along with moving horizon estimator
are used to maximize and regulate lipid production in a fed-batch heterotrophic microalgae …

State observers for reaction systems with improved convergence rates

R Ortega, A Bobtsov, D Dochain, N Nikolaev - Journal of Process Control, 2019 - Elsevier
The problem of designing state observers for reaction systems whose convergence rate is
faster than the standard asymptotic observers [7] is addressed in this paper. It is assumed …