Hits:

Indexed by:期刊论文

Date of Publication:2014-02-01

Journal:WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:30

Issue:2

Page Number:767-775

ISSN No.:0959-3993

Key Words:Continuous cultures; Nonlinear system; Robust control; mu-Synthesis

Abstract:In this paper, robust control problem using mu-synthesis in microbial continuous culture is studied. The dissimilation process of glycerol to 1,3-propanediol cannot avoid the disturbances caused by uncertain factors. Based on the biodynamical model, a control system with the initial glycerol concentration as input control is proposed to simplify the controller design. mu-synthesis method is applied to find a feedback controller to assure both of robust stability and robust performance of the closed-loop system simultaneously. To solve the corresponding structured singular value optimization problem, a converged result is obtained through D-K iteration method. The mu-synthesis system is also compared with the corresponding system. The simulation results indicate that the mu-controller might be more feasible for the continuous bioprocess controlling.