PERFORMANCE ANALYSIS OF PROPORTIONAL INTEGRAL DERIVATIVE CONTROLLER WITH DELAYED EXTERNAL RESET AND PROPORTIONAL INTEGRAL DERIVATIVE CONTROLLER FOR TIME DELAY PROCESS
Keywords:
PI/PID Controller, PI/PID with delayed external reset controller, Time delay processes, Evolutionary algorithmsAbstract
IIn the developed work, the traditional particle swarm optimization (PSO) technique is utilized to optimize parameters of PID controller with and without delayed external reset. Optimization of controller parameters, considering servo and regulatory performance, input energy usage, and robustness to model uncertainties is performed for the first order plus dead-time (FOPDT) process with various values of time delay. A robust controller is obtained by imposing constraints on the maximum sensitivity and complementary sensitivity functions. The connections between obtained parameters of the controller through optimization procedure and process model parameters have been analyzed. Further, the performance and robustness of PID with delayed external reset and PID controllers have been compared. The results show that the derivative action of PID with delayed external reset controller is not beneficial for the time delay processes where delay in time is greater than process time constant. Therefore, PI with delayed external reset and PID controllers are optimized for industrial time delay processes and performance comparison is presented. The results presented show that the PI controller with delayed external reset performed better for the time delay processes.
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