Journal of Process Control, Vol.20, No.6, 726-733, 2010
Tuning PI/PID controllers for integrating processes with deadtime and inverse response by simple calculations
A simple calculation method of a practical PI/PID controller tuning for integrating processes with dead-time and inverse response based on a model is presented in this study. First, analytical expressions for PI/PID controller settings based on the model using a direct synthesis method for disturbance rejection (DS-d) are employed. Next, optimum tuning parameter (lambda) for DS-d based on the model and minimum IAE criterion are obtained via the golden-section searching technique. These optimum lambda data are then empirically correlated into two equations. Thus, PI/PID controller settings for the model can easily be obtained from the parameter lambda using DS-d formulas. The advantage of the proposed method is that DS-d Pl/PID settings could be expediently sought by simple calculations using these equations without any tedious design. Simulation results have demonstrated that the proposed tuning technique can perform better for load/disturbance changes than other available methods in the literature. (C) 2010 Elsevier Ltd. All rights reserved.