Robust nonlinear integral control

Author

Jiang, Zhong-Ping ; Marcels, I.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Polytech. Univ., Brooklyn, NY, USA

Volume

46

Issue

8

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1336

Lastpage

1342

Abstract

It is well known from linear systems theory that an integral control law is needed for asymptotic set-point regulation under parameter perturbations. The note presents a similar result fur a class of nonlinear systems in the presence of an unknown equilibrium due to uncertain nonlinearities and dynamic uncertainties. Both partial state and output feedback cases are considered. Sufficient small-gain type conditions are identified for existence of linear and nonlinear control laws. A procedure for robust nonlinear integral controller design is presented and illustrated via a practical example of fan speed control

Keywords

control nonlinearities; control system synthesis; nonlinear control systems; robust control; uncertain systems; velocity control; asymptotic set-point regulation; dynamic uncertainties; fan speed control; output feedback; parameter perturbations; partial state; robust nonlinear integral control; sufficient small-gain type conditions; uncertain nonlinearities; unknown equilibrium; Automatic control; Control systems; Convergence; Covariance matrix; Measurement errors; Nonlinear control systems; Nonlinear systems; Robust control; Stochastic processes; Symmetric matrices;

fLanguage

English

Journal_Title

Automatic Control, IEEE Transactions on

Publisher

ieee

ISSN

0018-9286

Type

jour

DOI

10.1109/9.940947

Filename

940947