Peaking free output-feedback control of uncertain nonlinear systems

Author

Oliveira, Tiago Roux ; Peixoto, Alessandro Jacoud ; Hsu, Liu

Author_Institution

Dept. of Electr. Eng., Fed. Univ. of Rio de Janeiro, Rio de Janeiro

fYear

2008

fDate

11-13 June 2008

Firstpage

389

Lastpage

394

Abstract

Output-feedback sliding mode controllers are designed for single-input-single-output (SISO) uncertain nonlinear plants with state dependent nonlinearities. The sliding surface is generated using the states of a high gain observer (HGO) and the control law is peaking free. The control signal amplitude is either obtained from a simple norm observer or from the HGO states in conjunction with a dwell-time strategy, depending on the nonlinearity growth condition. Global or semi-global exponential stability with respect to a small residual set is proved without requiring the control to be a priori globally bounded. The advantages are better transient behavior and improved domain of stability.

Keywords

asymptotic stability; feedback; nonlinear control systems; observers; uncertain systems; variable structure systems; SISO uncertain nonlinear plant; dwell-time strategy; high gain observer; output-feedback sliding mode controller; semiglobal exponential stability; uncertain nonlinear system; Control nonlinearities; Control systems; Nonlinear control systems; Nonlinear systems; Observers; Open loop systems; Polynomials; Sliding mode control; Stability; State estimation; high gain observer; output-feedback; peaking avoidance; sliding mode control; uncertain nonlinear systems;

fLanguage

English

Publisher

ieee

Conference_Titel

American Control Conference, 2008

Conference_Location

Seattle, WA

ISSN

0743-1619

Print_ISBN

978-1-4244-2078-0

Electronic_ISBN

0743-1619

Type

conf

DOI

10.1109/ACC.2008.4586522

Filename

4586522