Title: PI-PD controller for stable and unstable processes

Authors: Swapnil Nema; Prabin Kumar Padhy

Addresses: Electronics and Communication Engineering, PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur, 482005, Madhya Pradesh, India ' Electronics and Communication Engineering, PDPM Indian Institute of Information Technology Design and Manufacturing, Jabalpur, 482005, Madhya Pradesh, India

Abstract: A simple model-based PI-PD control method is proposed for stable and unstable processes. Initially, the proportional-derivative (PD) controller is used to stabilise the process and then, proportional-integral (PI) controller parameters are estimated using the particle swarm optimisation (PSO) algorithm. The PSO is the stochastic evolutionary techniques that are used to find the global optimum solution in a search space that is divided into different sub-search spaces. In each sub-search spaces, the optimal value of local minima and global minima are estimated using a random particle position and random velocity. The minimum of the optimal values of the sub-search spaces is taken as the optimal value of total search space. Simulation results have been considered to verify the proposed algorithm for stable and unstable processes.

Keywords: particle swarm optimisation; PSO; proportional-integral proportional-derivative control; PI-PD controllers; single input single output; SISO; unstable processes; stable processes; PI control; PD control; parameter estimation; simulation.

DOI: 10.1504/IJSCC.2013.055989

International Journal of Systems, Control and Communications, 2013 Vol.5 No.2, pp.156 - 165

Received: 11 Feb 2013
Accepted: 13 May 2013
Published online: 12 Jul 2014 *

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