Abstract
In this paper, the Simulated Annealing (SA) optimization method is introduced to estimate the parameters of Fractional Order Proportional-Integral-Differential (FOPID) controller for controlling a ...
Highlights
In the recent years, modern control theories have made great advances
In this paper the performance comparison of Proportional- Integral-Derivative (PID) and Fractional Order Proportional-IntegralDifferential (FOPID) has been done on the basis of unit step response
In this paper we have used different tuning method to set the parameter of PID and FOPID to control a field controlled DC servo motor
Summary
Modern control theories have made great advances. Control techniques including unified feedback control, optimal control, predictive control, neural network control, fuzzy logic control and so on, have been developed significantly. Fractional Order Proportional Integral Differential Controller (FOPID) has gained more attention over the conventional PID controller as it has two extra control parameters. The limitation of a classical PID controller can be overcome by the introduction of additional tuning parameter that is the order of integrator and differentiator (Vinagre, Podlubny, Dorcak, & Feliu, 2000). With the help of fractional order PID controller it is possible to design a controller to ensure that the closed loop system is robust to gain variation and step response exhibits an iso-damping property (phase-bode plot of the system is flat at the gain crossover frequency) as a result system gets more robustness to gain variation (Chen et al, 2003). Only the latter term has to be approximated
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