Tuning of PID controllers based on the second-order model by calculation

A calculation method of PI and PID controller settings for nonoscillatory and oscillatory self-regulating processes with dead time was presented in this study. A PID control algorithm with anti-reset windup was also considered. Optimum controller tuning data based on the second-order-plus-dead-time model and the minimum IAE criterion were obtained via the Powell searching technique, and these data were then empirically fitted into several multiple-regression equations by a least-squares method. Thus, controller tuning based on the model could be expediently sought by calculation from these equations. Simulation results indicated that the proposed tuning technique can perform better than other available methods.