[HTML][HTML] Review and classification of recent observers applied in chemical process systems
Observers are computational algorithms designed to estimate unmeasured state variables
due to the lack of appropriate estimating devices or to replace high-priced sensors in a plant …
due to the lack of appropriate estimating devices or to replace high-priced sensors in a plant …
Respiration rate estimation using non-linear observers in application to wastewater treatment plant
A problem of respiration rate estimation using two new non-linear observers for a
wastewater treatment plant is addressed in this paper. In particular, a non-linear adaptive …
wastewater treatment plant is addressed in this paper. In particular, a non-linear adaptive …
Observer design for a class of uncertain nonlinear systems with sampled outputs—Application to the estimation of kinetic rates in bioreactors
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 …
where the output is available only at non uniformly spaced sampling instants. The …
Stability preserving maps for finite-time convergence: Super-twisting sliding-mode algorithm
The super-twisting algorithm (STA) has become the prototype of second-order sliding mode
algorithm. It achieves finite time convergence by means of a continuous action, without using …
algorithm. It achieves finite time convergence by means of a continuous action, without using …
Super‐twisting observer for second‐order systems with time‐varying coefficient
E Guzmán, JA Moreno - IET Control Theory & Applications, 2015 - Wiley Online Library
Discontinuous Observers, in particular those based in the Super‐Twisting Algorithm, are
able to estimate the unknown input of a system in finite time when the relative degree is one …
able to estimate the unknown input of a system in finite time when the relative degree is one …
State observers for reaction systems with improved convergence rates
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 …
faster than the standard asymptotic observers [7] is addressed in this paper. It is assumed …
Second-order sliding mode observer for multiple kinetic rates estimation in bioprocesses
Specific kinetic rates are key variables regarding metabolic activity in bioprocesses. They
are non-linear functions of concentrations and operating conditions and therefore of difficult …
are non-linear functions of concentrations and operating conditions and therefore of difficult …
Reaction rate reconstruction from biomass concentration measurement in bioreactors using modified second-order sliding mode algorithms
This paper deals with the estimation of unknown signals in bioreactors using sliding
observers. Particular attention is drawn to estimate the specific growth rate of …
observers. Particular attention is drawn to estimate the specific growth rate of …
An observability and detectability analysis for non-linear uncertain CSTR model of biochemical processes
M Czyżniewski, R Łangowski - Scientific Reports, 2022 - nature.com
The problem of proving observability/detectability properties for selected non-linear
uncertain model of biochemical processes has been addressed in this paper. In particular …
uncertain model of biochemical processes has been addressed in this paper. In particular …
An extended super-twisting algorithm for simultaneous estimation of reaction rates and input disturbance in bioprocess
VA Reza López, JN Guerrero Tavares… - Journal of Process …, 2023 - Elsevier
The present contribution deals with the simultaneous estimation of the reaction rates and
input disturbances in a bioprocess. Online estimation of just the reaction rates is possible by …
input disturbances in a bioprocess. Online estimation of just the reaction rates is possible by …