Title :
A new robust adaptive control scheme of discrete time nonlinear systems
Author :
Yue Fu ; Xiaojie Zhou
Author_Institution :
State Key Lab. of Synthetical Autom. for Process Ind., Northeastern Univ., Shenyang, China
Abstract :
In this paper, for general discrete time nonlinear systems, to overcome the limitations by using the first order Taylor expansion linearization, the higher order Taylor expansion function is first introduced. Then based on the higher order Taylor expansion function, a new recursive estimator with a deadzone is developed. By using the estimator, a robust adaptive controller is finally presented. The global stability and the tracking performance of the closed-loop system are obtained through Lyapunov analysis and simulations.
Keywords :
Lyapunov methods; adaptive control; closed loop systems; discrete time systems; linearisation techniques; nonlinear systems; recursive estimation; robust control; simulation; Lyapunov analysis; closed-loop system; first order Taylor expansion linearization; general discrete time nonlinear systems; global stability; higher order Taylor expansion function; recursive estimator; robust adaptive control scheme; simulation; Adaptive control; Closed loop systems; Robustness; Stability analysis; Taylor series; Vectors; Robust adaptive controller; discrete-time; global stability; nonlinear system; recursive estimator;
Conference_Titel :
Intelligent Control and Automation (WCICA), 2014 11th World Congress on
DOI :
10.1109/WCICA.2014.7053074
