Growth rate maximization in fed-batch processes using high order sliding controllers and observers based on cell density measurement

TitleGrowth rate maximization in fed-batch processes using high order sliding controllers and observers based on cell density measurement
Publication TypeJournal Article
Year of Publication2018
AuthorsJamilis M, Garelli F, De Battista H
JournalJournal of Process Control
Volume68
Pagination23 - 33
Date Published04/2018
ISSN0959-1524
Keywordsextremum seeking, Fed-batch, Gradient, Sliding mode
Abstract

A novel extremum seeking scheme is proposed for the optimization of the specific growth rate in fed-batch processes with substrate inhibited kinetics. The proposed controller is based on a high order sliding mode algorithm, which uses the gradient of the specific growth rate as switching coordinate. A gradient estimation is obtained through a high order sliding mode observer. Both the control and gradient estimation algorithms are finite-time stable. The stability of the controller is analysed using Lyapunov functions for both the unperturbed and perturbed cases and guidelines for the algorithm tuning are provided. The controller and observer algorithms are numerically assessed and simulation results are obtained for a set of different scenarios.

URLhttps://www.sciencedirect.com/science/article/pii/S0959152418300659
DOI10.1016/j.jprocont.2018.04.003
Research Line: 
Control de sistemas y procesos biológicos
Control of biological processes and systems
Control and monitoring of bioprocesses
Control y monitoreo de bioprocesos