Title :
Stability analysis of variable-structured PI controller by fuzzy logic for servo system
Author_Institution :
Dept. of Comput. Sci. & Syst. Eng., Muroran Inst. of Technol., Japan
Abstract :
The author proposes a variable structure PI 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). 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 :
control system analysis; fuzzy control; stability; two-term control; variable structure systems; Lyapunov stability theorem; asymptotic stability; control analysis; fast response; fuzzy logic; global stability; servo system; stability analysis; variable-structured PI controller; Error correction; Fuzzy control; Fuzzy logic; Pi control; Proportional control; Servomechanisms; Servomotors; Stability analysis; Time factors; Velocity control;
Conference_Titel :
Decision and Control, 1991., Proceedings of the 30th IEEE Conference on
Conference_Location :
Brighton
Print_ISBN :
0-7803-0450-0
DOI :
10.1109/CDC.1991.261564
