Title :
Robust nonlinear integral control
Author :
Jiang, Zhong-Ping ; Marcels, I.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Polytech. Univ., Brooklyn, NY, USA
fDate :
8/1/2001 12:00:00 AM
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;
Journal_Title :
Automatic Control, IEEE Transactions on
