Title :
Unknown Input Observers for Switched Nonlinear Discrete Time Descriptor Systems
Author :
Koenig, D. ; Marx, Benoit
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN
Abstract :
In this paper, a linear matrix inequality technique for the state estimation of discrete-time, nonlinear switched descriptor systems is developed. The considered systems are composed of linear and nonlinear parts. An observer giving a perfect unknown input decoupled state estimation is proposed. Sufficient conditions of global convergence of observers are proposed. Numerical examples are given to illustrate this method.
Keywords :
convergence; discrete time systems; linear matrix inequalities; linear systems; nonlinear control systems; observers; time-varying systems; decoupled state estimation; global convergence; linear matrix inequality; linear system; switched nonlinear discrete time descriptor system; unknown input observers; Control systems; Linear matrix inequalities; Nonlinear systems; Observers; Pulse width modulation converters; Riccati equations; Stability; State estimation; Sufficient conditions; Switched systems; Hybrid systems; polyquadratic stability; switched descriptor systems; unknown input (UI) observers;
Journal_Title :
Automatic Control, IEEE Transactions on
DOI :
10.1109/TAC.2007.914226
