High order sliding mode observer based extremum seeking controller for a continuous stirred tank bioreactor

Daaou, Bachir; Dochain, Denis

doi:10.1109/ceit.2015.7233018

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…For the bioreactor, a number of control strategies have been applied. For example, DO-stat control strategy [96][97][98][99][100][101] and Extremum seeking control strategy [102][103][104]. DO stat or pH stat control strategies are based on the concept of indirect feedback control.…”

Section: Model-based Controlmentioning

confidence: 99%

Bioprocess Control: Current Progress and Future Perspectives

Rathore

Mishra

Nikita

et al. 2021

Life

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Typical bioprocess comprises of different unit operations wherein a near optimal environment is required for cells to grow, divide, and synthesize the desired product. However, bioprocess control caters to unique challenges that arise due to non-linearity, variability, and complexity of biotech processes. This article presents a review of modern control strategies employed in bioprocessing. Conventional control strategies (open loop, closed loop) along with modern control schemes such as fuzzy logic, model predictive control, adaptive control and neural network-based control are illustrated, and their effectiveness is highlighted. Furthermore, it is elucidated that bioprocess control is more than just automation, and includes aspects such as system architecture, software applications, hardware, and interfaces, all of which are optimized and compiled as per demand. This needs to be accomplished while keeping process requirement, production cost, market value of product, regulatory constraints, and data acquisition requirements in our purview. This article aims to offer an overview of the current best practices in bioprocess control, monitoring, and automation.

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Section: Model-based Controlmentioning

confidence: 99%

Bioprocess Control: Current Progress and Future Perspectives

Rathore

Mishra

Nikita

et al. 2021

Life

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“…In literature, it is shown that higher-order sliding mode techniques can improve the performance of the observer in high uncertain conditions. − The high-order sliding mode is a generalization of traditional sliding modes in which an injection term acts on higher derivatives of the sliding variable . Higher-order sliding mode observers (HOSMO) have been widely studied and developed for diverse applications in mechanical systems. , More recently, applications of the HOSMO for state and input estimation of bioprocesses have been reported in refs − . Nevertheless, as far as we know, there is not HOSMO schemes for online estimation of AD process with only the methane outflow rate as the measurable signal.…”

Section: Introductionmentioning

confidence: 99%

Software Sensor for Online Estimation of the VFA’s Concentration in Anaerobic Digestion Processes via a High-Order Sliding Mode Observer

Lara-Cisneros

Dochain

2018

Ind. Eng. Chem. Res.

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This paper deals with the design of a software sensor based on a high-order sliding mode observer (HOSMO) for online estimation of the concentration of volatile fatty acids (VFA’s) in a class of continuous anaerobic digestion processes (AD). Taking into account the limited availability for online monitoring of AD processes, in this contribution it is assumed that only the methane outflow rate is available for online measurement. Considering a simple two-dimensional AD model, it is shown that the VFA concentration can be detectable from the online measurement of the methane outflow rate. The estimation method is based on a local coordinate transformation that converts the original model into an observable system. In the observable form, a supertwisting algorithm is proposed in order to provide robustness under perturbation and uncertainty conditions. The observer convergence is analyzed by using Lyapunov stability techniques. Numerical simulations illustrate the effectiveness of the proposed estimation scheme for a four-dimensional AD model with uncertainties associated with unmodeled dynamics and disturbances in the inflow composition.

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On-line estimation of the VFA concentration in anaerobic digestion processes based on a super-twisting observer

Lara-Cisneros

Dochain

2018

2018 5th International Conference on Control, Decision and Information Technologies (CoDIT)

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High order sliding mode observer based extremum seeking controller for a continuous stirred tank bioreactor

Cited by 3 publications

References 19 publications

Bioprocess Control: Current Progress and Future Perspectives

Bioprocess Control: Current Progress and Future Perspectives

Software Sensor for Online Estimation of the VFA’s Concentration in Anaerobic Digestion Processes via a High-Order Sliding Mode Observer

On-line estimation of the VFA concentration in anaerobic digestion processes based on a super-twisting observer

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