A novel cascaded fractional fuzzy approach for control of fermentation process

[Display omitted] •A cascaded control structure is developed for the efficient control of bioreactor.•FOFPD and FOFPI are used as primary and secondary controllers respectively.•NSGA-II is utilized to estimate the design parameters of the FOFPD/PI controller.•Detailed performance analysis for setpoi...

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Bibliographic Details
Published in:Bioresource technology 2022-08, Vol.357, p.127377-127377, Article 127377
Main Authors: Mohan, Vijay, Pachauri, Nikhil, Panjwani, Bharti, Kamath, Dattaguru V.
Format: Article
Language:English
Subjects:
Bioreactor
FOFPD/PI
IOFPD/PI
Microorganism
NSGA-II
Temperature
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Summary:[Display omitted] •A cascaded control structure is developed for the efficient control of bioreactor.•FOFPD and FOFPI are used as primary and secondary controllers respectively.•NSGA-II is utilized to estimate the design parameters of the FOFPD/PI controller.•Detailed performance analysis for setpoint and disturbance rejection is exhibited. In this work, a cascaded control strategy based on fractional-order fuzzy PD/PI (FOFPD/PI) is proposed for temperature control of the bioreactor. The FOFPI is used to control the ethanol concentration in the inner loop, while the FOFPD is used for temperature control of the bioreactor in the outer loop. The integer order fuzzy PD/PI (IOFPD/PI), 2DOF FOPID, 2DOF PID, and PID are also designed for comparison purposes. The design parameter of FOFPD/PI and IOFPD/PI are estimated using non-dominated sorting genetic algorithm II (NSGA-II). Results revealed that the proposed cascaded control scheme reduced the IAE by 33.5 %, 40.5%, 47%, and 64% compared to IOFPD/PI, 2DOF FOPID, 2DOF PID, and PID, respectively. Hence, it can be concluded that the proposed FOFPD/PI controller provides precise control of reactor temperature in different operating conditions compared to other controllers.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2022.127377