Two degree of Freedom Fractional Order PID based Temperature control of Fermentation Process

[+] Author and Article Information
Nikhil Pachauri

Department of Electrical and Electronics Engineering, Delhi Technical Campus (DTC), 28/1, Knowledge Park-III, Greater Noida, Uttar Pradesh 201306

Vijander Singh

Instrumentation and Control Engineering Division, Azad Hind Fauz Marg, NSIT, Dwarka Sec-3, New Delhi-110078

Asha Rani

Instrumentation and Control Engineering Division, Azad Hind Fauz Marg, NSIT, Dwarka Sec-3, New Delhi-110078

1Corresponding author.

ASME doi:10.1115/1.4038656 History: Received October 19, 2016; Revised November 29, 2017


Temperature is one of the essential parameter in a fermentation process which affects the thermal movement of cells. The temperature range for such processes is very tight and must be maintained precisely for efficient operation. Therefore, in the present work combination of fractional calculus and two degrees of freedom PID (2-DOF-PID) controller is proposed for the desired temperature control of bioreactor. The 2-DOF-PID controller incorporates an extra control loop whereas the fractional operator offers additional tractability for alteration in system dynamics. In order to achieve efficient execution of the control strategies, the design parameters are optimized with the help of Non-dominated sorted genetic algorithm -II (NSGA-II) and Cuckoo search algorithm (CSA). NSGA-II tuned controllers perform better than the CSA tuned controllers. Further the results show that proposed controller regulates the temperature of the bioreactor in a more robust and efficient manner in comparison to other designed controllers.

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