PSO Optimized PID Controller Design for the Process Liquid Level Control

In modern industrial applications, the process liquid level needs to be maintained at a pre-defined level to achieve higher efficiency and final product quality. For uninterrupted electric power generation, the boiler tank water level has to be continuously controlled and monitored. The Proportional-Integral-Derivative (PID) is commonly used in such processes to attain better response. The PID Controllers have lesser development costs, superior features and yields in better system output. In this paper, the PID gain terms are tuned by Particle Swarm Optimization (PSO) algorithm. The PSO has simple concept, implementation is simple. The process liquid level control of a plant by conventional PID and PSO optimized PID controllers has been analyzed and quantitatively compared. The computer simulation results show far better settling time and peak values with PSO optimized PID control, thus ensuring overall higher efficiency.