Efficient Design and Comparative Performance Analysis of PID Controller Applied To Automatic Voltage Regulator Employing Symbiotic Organisms Search Algorithm
AbstractThis article attempts to solve the problem of efficient design of proportional+integral+derivative (PID) controller applied to automatic voltage regulator (AVR) by employing recently introduced symbiotic organism search (SOS) algorithm for the first time. SOS is a metaheuristic proved recently to be promising by benefitting from the idea of imitating natural phenomena of interactive behavior seen among organisms living together in a similar environment. PID controller design needs proper determination of three control parameters. Such a design problem can be taken as an optimization task and SOS is invoked to find out better controller parameters through the new cost function defined in the paper, which allows to evaluate the control behavior in both time-domain and frequency-domain. For the performance analysis, distinct analysis techniques are deployed such as transient response analysis, root locus analysis and bode analysis. The efficacy of the presented technique is widely illustrated by comparing the obtained results with those reported in some prestigious journals and it is shown that our proposal leads to a more satisfactory control performance from the perspective of both time-domain and frequency-domain specifications.