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International Journal of Scientific and Engineering Research
ISSN Online 2229-5518
ISSN Print: 2229-5518 6    
Website: http://www.ijser.org
scirp IJSER >> Volume 3,Issue 6,June 2012
Performance Analysis of Fractional Order PID Controller with the Conventional PID Controller for Bioreactor Control
Full Text(PDF, )  PP.134-139  
Author(s)
Shivaji Karad, Dr. S. Chatterji, Prasheel Suryawanshi
KEYWORDS
PID controller, Fractional Calculus, Fractional PID controller, Bio-reactor control
ABSTRACT
Despite the dramatic advancement of process control in recent decades, the proportional-integral-derivative (PID) controller contin-ues to be the most frequently used feedback controller today. PID control mechanism, the ubiquitous availability of reliable and cost effective commercial PID modules, and pervasive operator acceptance are among the reasons for the success of PID controllers. An elegant way of enhancing the performance of PID controllers is to use fractional-order controllers where I and D-actions have, in general, non-integer orders. In a PI?Dd controller, besides the proportional, integral and derivative constants, denoted by Kp, Ti and Td respectively, we have two more adjustable parameters: the powers of s in integral and derivative actions, viz. ? and d respectively. This paper compares the performance of conventional PID and fractional PID controllers used for bio-reactor control.
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