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- Title
Near optimal Control of Bioreactor with Input Multiplicities by Fuzzy Logic Method.
- Authors
Reddy, G. Prabhaker; Eranna, B. C.
- Abstract
In the present work, a Fuzzy logic controller is analyzed to a continuous bioreactor which exhibits input multiplicities in dilution rate on productivity, i.e., two values of dilution rate will give the same value of productivity. The performance of proposed Fuzzy logic controller and conventional PI controller have been evaluated near optimum productivity. As the Fuzzy controller provides always the two values of Dilution rate for control action and by selecting the value nearer to the operating point, it is found to give stable and faster responses than conventional PI controller. The PI controller results in wash out condition or switch over from initial lower input dilution rate to higher input dilution rate or vice versa. Thus, Fuzzy control is found to overcome the control problems of PI controller due to the input multiplicities near optimal productivity. It is interesting to note that the present fuzzy logic controller is giving superior performance like previously proposed nonlinear controller by authors (Reddy, G.P. and Chidambaram, M (1995)) to overcome the control problems due to input multiplicities and however fuzzy logic cntroller is less computationally involved than nonlinear controller.
- Subjects
BIOREACTORS; FUZZY logic; DILUTION; INDUSTRIAL productivity; NONLINEAR control theory; MULTIPLICITY (Mathematics); FERMENTATION; FUZZY systems; REDDY, G. P.; CHIDAMBARAM, M.
- Publication
Journal of Artificial Intelligence: Theory & Application, 2010, Vol 1, Issue 2, p48
- ISSN
1737-9334
- Publication type
Article