A New Optimization Method of PID Control Parameters for Automatic Tuning by Process Computer

Abstract The method for the optimization of PID control parameters is proposed to aid the tuning operation of field engineers. The control system is restricted to the single-input single-output process, but may have time delay and non-self-regulation property. For the parameter estimation of the process, the characteristic areas are defined. In order to optimize control parameters, a new performance index is defined in the form of the weighted integral of squared error. The closed loop response obtained by the optimal settings has the desired damping factor and the stability margin. The present algorithm is implemented on a DDC system. The field tests carried out by using this system assure us that the method is applicable for the real processes.