Title :
Analytical tuning rules for digital PID type controllers via the magnitude optimum criterion
Author :
Papadopoulos, K.G. ; Tselepis, N.D. ; Margaris, N.I.
Author_Institution :
Dept. of Medium Voltage Drives, ABB Switzerland Ltd., Turgi, Switzerland
Abstract :
Analytical tuning rules for digital PID type-I control loops are presented. Controller parameters are determined explicitly as a function of the process parameters and the sampling time of the controller. For developing the proposed theory a generalized single-input single-output stable process model is employed consisting of n-poles, no zeros plus unknown time delay-d. The derivation of the proposed PID control law lies in the principle of the well known Magnitude Optimum criterion. The conventional PID tuning via the Magnitude Optimum criterion is compared with the revised PID control law for several process models met in various industry applications via simulation examples. The revised PID tuning achieves significant improvement of up to 47% reduction of settling time regarding output disturbance rejection and reference tracking even for benchmark processes with long time delay or dominant time constants.
Keywords :
control system synthesis; delays; digital control; sampling methods; stability; three-term control; PID control law; analytical tuning rules; benchmark process; digital PID type controllers; digital PID type-I control loops; generalized single-input single-output stable process model; magnitude optimum criterion; output disturbance rejection; process parameters; reference tracking; sampling time; settling time; time delay; Industries;
Conference_Titel :
Industrial Technology (ICIT), 2012 IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4673-0340-8
DOI :
10.1109/ICIT.2012.6210049