Title of article :
Design of Centralized Fractional order PI Controller for Two Interacting Conical Frustum Tank Level Process
Author/Authors :
Lakshmanaprabu, S. K B S Abdur Rahman Crescent University, Chennai, Tamilnadu, India , Wahid Nasir, A National Institute of technology Jamshedpur, Jharkhand, India , Sabura Banu, U B S Abdur Rahman Crescent University, Chennai, Tamilnadu, India
Abstract :
The mathematical model for two interacting conical frustum tank level (TICFTL) process is proposed. The
control of TICFTL process is difficult due to the nonlinearity, interaction effect between input flow and
output level of tanks. Hence, the nonlinear process is linearised around proper operating points. Then, the
decentralized PI, centralized PI, centralized FOPI controllers are designed and then the control parameters are
tuned using genetic algorithm. The closed loop controller performances are simulated and compared in terms
of settling time, rise time and integral error criteria. It is found that centralized PI controller has better servo
and regulatory response than the decentralized PI, centralized FOPI controller. The liquid inflow rates are
optimally manipulated by the centralized PI controller to track the set point variation and to reject the
disturbance effectively than centralized FOPI, decentralized PI controller.
Keywords :
Decentralized PI controller , FOPI , Centralized PI , Level control , Flow control , Two interacting conical frustum tank level process
Journal title :
Astroparticle Physics
