Design of new adaptive fuzzy logic controller for nonlinear plants with unknown or time-varying dead zones

Author

Oh, Seok-Yong ; Park, Dong-Jo

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

6

Issue

4

fYear

1998

fDate

11/1/1998 12:00:00 AM

Firstpage

482

Lastpage

491

Abstract

An adaptive fuzzy logic controller (FLC) is designed for plants with unknown and/or time-varying dead zones. The steady-state control resolutions with perturbing action, which are different from the ones in the transient states, are used to cancel out the unknown and/or time-varying dead-zone effects. Automatically adjusted control resolutions play a key role as a fuzzy dead-zone inverse. The control resolutions of the control input variables are dependent on the scaling gains of the variables. Therefore, we can develop the fuzzy dead-zone inverse by reperturbing and adjusting the scaling gains adequately in the steady-states. The developed fuzzy logic controllers that are applied to the plants with unknown dead zones ensure their effectiveness even though the dead-zone characteristics are time varying

Keywords

adaptive control; control system synthesis; fuzzy control; nonlinear control systems; adaptive fuzzy logic controller; fuzzy dead-zone inverse; nonlinear plants; perturbing action; scaling gains; steady-state control resolutions; time-varying dead zones; unknown dead zones; Adaptive control; Automatic control; Electric variables control; Fuzzy control; Fuzzy logic; Input variables; Performance gain; Programmable control; Steady-state; Uncertainty;

fLanguage

English

Journal_Title

Fuzzy Systems, IEEE Transactions on

Publisher

ieee

ISSN

1063-6706

Type

jour

DOI

10.1109/91.728437

Filename

728437