Fuzzy logic control of an unstable bioreactor |
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Authors: | M Srinivas M Chidambaram |
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Institution: | (1) Department of Chemical Engineering, Indian Institute of Technology, 600 036 Madras, India |
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Abstract: | A rule based fuzzy controller (FLC) is developed for stabilization of an unstable continuous stirred tank bioreactor (CSTBR) from various start-up conditions. The output variable is the reactor substrate concentration and the manipulated variable is the dilution rate. The performance of the FLC is evaluated by simulating a mathematical model of an unstable CSTBR. FLC is robust to perturbations in the specific growth rate, specific consumption rate and also to a disturbance in the feed substrate concentration. The performance of the FLC is superior to that of a conventional proportional controller. |
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