Title :
On tuning FO[PI] controllers for FOPDT processes
Author :
Badri, V. ; Tavazoei, Mohammad Saleh
Author_Institution :
Electr. Eng. Dept., Sharif Univ. of Technol., Tehran, Iran
Abstract :
A method recently proposed for tuning fractional order [proportional integral] (FO[PI]) controllers is investigated. This tuning method, when applied in control of first-order plus dead time (FOPDT) processes, can ensure the desired phase margin, the desired gain crossover frequency and the flatness of the phase Bode plot at such a frequency. The necessary and sufficient condition for the applicability of the aforementioned tuning method is derived. Also, it is shown that this condition can be used in obtaining the achievable performance region of the tuning method in the gain crossover frequency-phase margin plane.
Keywords :
Bode diagrams; PI control; control system synthesis; FO-PI controller tuning; FOPDT processes; first-order plus dead time; fractional order-proportional integral controllers; gain crossover frequency-phase margin plane; phase Bode plot; tuning method;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.2457
