State and Fault Estimation of a Class of Nonlinear Systems with Slow Internal Dynamics: Asymptotic Decoupling Approach
Résumé
This paper presents an Unknown Input Observer (UIO) for a class of Lipschitz nonlinear
systems affected by disturbances/faults and having slow internal dynamics after the decoupling of
the Unknown Input (UI). Thanks to the Asymptotic Decoupling notion, the constraint related to the
internal dynamics is bypassed. The nonlinear UIO presents time varying dynamics that allows to
obtain the Asymptotic Decoupling notion. It will be shown that the proposed approach allows to
enhance the convergence rate of the UIO. The convergence enhancement of the state estimation error
is demonstrated via a Lyapunov analysis and the established conditions are expressed in terms of Linear
Matrix Inequalities. Finally, simulations will be given in order to illustrate the proposed approach with
some comparisons to existing techniques.
Origine | Fichiers produits par l'(les) auteur(s) |
---|