Discrete-time nonlinear observer-based estimators for the on-line estimation of the kinetic rates in bioreactors

被引:11
作者
Farza, M
Othman, S
Hammouri, H
Fick, M
机构
[1] UNIV LYON 1,ESCPE LYON,CNRS UPRESA Q 5007,LAB AUTOMAT & GENIE PROC LAGEP,F-69622 VILLEURBANNE,FRANCE
[2] ENSAIA,CNRS,LAB SCI GENIE CHIM,F-54502 VANDOEUVRE NANCY,FRANCE
关键词
D O I
10.1007/s004490050382
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Simple discrete-time estimators which allow the on-line estimation of the kinetic rates from the measurements of components' concentrations inside a bioreactor are proposed. In fact, the proposed estimators are obtained by a direct forward Euler discretization of continuous-time estimators. The design of the estimators in the continuous as well as in the discrete-time does not require or assume any model for the kinetic rates. One of the main characteristics of these estimators lies in the easiness of their calibration. We here emphasize on the performances of the discrete version of these estimators, whose stability and convergence are proved under the same conditions as in the continuous case with an additional mild assumption on the sampling time. Simulation and real-life experiments results corresponding to the discrete estimation are given. The accuracy of the obtained estimates as well as the easiness of the estimators' implementation do constitute reliable and powerful arguments for their use, in particular in adaptive control schemes.
引用
收藏
页码:247 / 255
页数:9
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