Title :
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
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;
Conference_Titel :
American Control Conference, 2008
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4244-2078-0
Electronic_ISBN :
0743-1619
DOI :
10.1109/ACC.2008.4586522
