Abstract
In this paper, PI-PD controller is designed for stable and unstable Single-Input Single-Output (SISO) processes. At first, the expression is derived using Routh stability criteria for Proportional-Derivative (PD) controller to stabilize the process then Proportional-Integral (PI) controller parameters are designed using Modified Particle Swarm Optimization (MPSO) algorithm. In this stochastic evolutionary technique, the convergence speed, stability and computational time are improved by selecting the acceleration constants & inertia weight in the suggested range. Simulation results have been considered to verify the proposed method for stable and unstable SISO processes.
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