Title :
Stability analysis of variable-structured PI controller by fuzzy logic for servo system
Author :
Dote, Yasuhiko ; Saitoh, Tamotsu
Author_Institution :
Dept. of Comput. Sci. & Syst. Eng., Muroran Inst. of Technol., Japan
fDate :
28 Oct-1 Nov 1991
Abstract :
The authors propose a variable structure PI (proportional plus integral) controller whose structure is continuously varied by fuzzy logic such that a proportional controller dominates the integral controller if the absolute value of the error is large and vice versa in order to obtain a high-performance controller (with quick time response and without overshoot). Then it is applied to servo motor speed control. The global and asymptotic stability of the overall control system is proved by using the Lyapunov stability theorem
Keywords :
Lyapunov methods; fuzzy logic; machine control; servomotors; stability; two-term control; variable structure systems; velocity control; Lyapunov stability theorem; asymptotic stability; fuzzy logic; global stability; proportional plus integral controller; servo motor speed control; servo system; variable-structured PI controller; Error correction; Fuzzy control; Fuzzy logic; Pi control; Proportional control; Servomechanisms; Servomotors; Stability analysis; Time factors; Velocity control;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-87942-688-8
DOI :
10.1109/IECON.1991.239357
