Nonlinear fuzzy control on a hydraulic servo system

Author

Zhao, Yongqian ; LeQuoc, Sinh ; Saad, Maarouf

Author_Institution

Ecole de Technol. Superieure, Montreal, Que., Canada

Volume

5

fYear

1998

fDate

21-26 Jun 1998

Firstpage

2917

Abstract

Hydraulic position servo systems are commonly used in industry. This kind of systems is nonlinear in nature and generally difficult to control. The ordinary linear constant gain controller will cause overshoot or even loss of system stability. Application of fuzzy logic controller to a nonlinear hydraulic servo system is investigated in this paper. The dynamic model of the system is given and the stability is also analyzed using Kriging approximation method and Popov´s criterion. The steady state error can be eliminated with dead band nonlinearity using this fuzzy controller combined with an integration term. Simulation results show the performance of the fuzzy controller with fast response and less overshoot

Keywords

Popov criterion; fuzzy control; hydraulic control equipment; nonlinear control systems; position control; servomechanisms; stability; statistical analysis; Kriging approximation method; Popov criterion; dead band nonlinearity; fuzzy logic controller; hydraulic position servo systems; nonlinear fuzzy control; nonlinear hydraulic servo system; ordinary linear constant gain controller; overshoot; steady state error; system stability loss; Control systems; Electrical equipment industry; Fuzzy control; Fuzzy logic; Gain; Nonlinear control systems; Nonlinear dynamical systems; Servomechanisms; Stability analysis; Stability criteria;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 1998. Proceedings of the 1998

Conference_Location

Philadelphia, PA

ISSN

0743-1619

Print_ISBN

0-7803-4530-4

Type

conf

DOI

10.1109/ACC.1998.688391

Filename

688391