Industrial Automatic Control Systems and Controllers Annotation << Back On the selection of optimality criterion in numerical calculations of automatic control systems with PID controller N.I. SMIRNOV, I.M. SHAROVIN The results of different optimality criteria application in the numerical optimization of tuning parameters of a single-loop automatic control system. The research continues [1] where control systems with a PI controller were considered. Along with integral criteria applied for step responses calculation, a criterion minimizing the control variable’s variance under random disturbances is investigated. The search of optimal settings is performed by numerical procedure based on Optim-MGA evolutionary algorithm [2,3]. Keywords: evolutionary optimization algorithm, optimality criterion, stability margin, integral criteria, optimal settings, correlation function, simulation.