Two-degree of freedom PID controller in time delay system using hybrid controller model
by Ganesan Kannan; G. Saravanakumar; M. Saraswathi
International Journal of Automation and Control (IJAAC), Vol. 12, No. 3, 2018

Abstract: In the paper, a hybrid method based two-degree of freedom (2-DOF) PID controller is proposed for tuning the time delay system. The hybrid technique is the combination of fuzzy logic controller (FLC) and gravitational search algorithm (GSA). Here, the GSA is utilised for generating the logic rules of FLC. The 2-DOF proportional integral and derivative (PID) controller ensures highly efficient disturbance rejection and reliable performance. Here, tuning of a 2-DOF PID controller with a time delay system design achieves a high performance for a wide range. For the automatic tuning process, the parameters of time delays system is predicted and tuned optimally in the short period of time. The first order time delay system is tuned and the stability parameters such as small overshoot, settling time and rising time has been achieved. From the results, it is noted that, proposed controller provides enhanced results for the reference tracking and disturbance rejection operations. The effectiveness and feasibility of the proposed technique is demonstrated through the MATLAB/Simulink platform and the performance is tested and compared with the existing controller tuning methods such as FLC technique with genetic algorithm (GA) and artificial neural network (ANN) techniques.

Online publication date: Sun, 01-Jul-2018

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