Authors: Hisbullah M A Hussain K B Ramachandran
Publish Date: 2001/11/27
Volume: 24, Issue: 5, Pages: 309-318
Abstract
The crucial problem associated with control of fedbatch fermentation process is its timevarying characteristics A successful controller should be able to deal with this feature in addition to the inherent nonlinear characteristics of the process In this work various schemes for controlling the glucose feed rate of fedbatch bakers yeast fermentation were evaluated The controllers evaluated are fixedgain proportionalintegral PI scheduledgain PI adaptive neural network and hybrid neural network PI The difference between the specific carbon dioxide evolution rate and oxygen uptake rate Q c –Q o was used as the controller variable The evaluation was carried out by observing the performance of the controllers in dealing with setpoint tracking and disturbance rejection The results confirm the unsatisfactory performance of the conventional controller where significant oscillation and offsets exist Among the controllers considered the hybrid neural network PI controller shows good performance
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