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

fYear

1991

fDate

28 Oct-1 Nov 1991

Firstpage

363

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on

Conference_Location

Kobe

Print_ISBN

0-87942-688-8

Type

conf

DOI

10.1109/IECON.1991.239357

Filename

239357