Ch V Naga Sowjanya
Sri Venkateswara University, India
Title: Comparison of pid parameter using multiple dominant poleplacement technique with other techniques for stable third order processes
Biography
Biography: Ch V Naga Sowjanya
Abstract
Tuning of PID Controller for stable Th ird Order plus Time Delay (TOPTD) and Th ird Order plus Time Delay with a Zero (TOPTDZ) system is proposed in the present work. Th e PID Controller is designed based on Multiple Dominant Pole Placement (MDP) Method. Simulation results on linear models of TOPTD and TOPTDZ and non-linear models like isothermal CSTR and bio-reactor are done to observe the performance of the proposed Controller using errors like Integral Square Error (ISE), Integral Absolute Error (IAE) and Integral Time Absolute Error (ITAE). Th e performance under model uncertainty is also observed considering perturbation in one parameter at a time using Kharitonov’s theorem. For stable TOPTD/TOPTDZ systems,performance of the proposed MDPPID controller is compared with the controller designed based on performance specifi cation like Overshoot (Shamsuzzoha 2013), the controller designed by IMC method (Zhi-cheng et al., 2010; Shamsuzzoha and Lee, 2007), Direct Synthesis Method (DSM) (Chidambaram, 1998; Chen and Seborg, 2002; Seshagiri rao and Chidambaram,2006) and Equating Coeffients (EC) (Padma Sree and Chidambaram, 2006) method both for perfect parameters and for model uncertainty. Simulation results on number of case studies of stable TOPTD, TOPTDZ and non-linear models are presented to show the eff ectiveness of the proposed method, which tells that the proposed MDP-PID controller gives better results when compared with the other methods.