Tuning PI/PID controllers for integrating processes with deadtime and inverse response by simple calculations |
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Authors: | Neng-Sheng Pai Shih-Chi Chang Chi-Tsung Huang |
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Affiliation: | 1. Department of Electrical Engineering, National Chin-Yi University of Technology, Taiping, Taichung 41111, Taiwan;2. Department of Chemical and Materials Engineering, Tunghai University, Taichung 40704, Taiwan |
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Abstract: | A simple calculation method of a practical PI/PID controller tuning for integrating processes with deadtime 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 (λ) for DS-d based on the model and minimum IAE criterion are obtained via the golden-section searching technique. These optimum λ data are then empirically correlated into two equations. Thus, PI/PID controller settings for the model can easily be obtained from the parameter λ using DS-d formulas. The advantage of the proposed method is that DS-d PI/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. |
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