Unknown inputs observers for a class of nonlinear systems

Moncef Triki (1, 2) , Mondher Farza (2) , Tarek Maatoug (1) , Mohammed M'Saad (2) , Yassine Koubaa (1) , Boutaib Dahhou (3)

1 CEM Lab - ENIS - Département de Génie Électrique de Sfax [ENIS]
2 Equipe Automatique - Laboratoire GREYC - UMR6072
3 LAAS-DISCO - Équipe DIagnostic, Supervision et COnduite

A high gain observer is proposed for a class of multi-output nonlinear systems with unknown inputs in order to simultaneously estimate the whole state as well as the unknown inputs. The gain of this observer does not require the resolution of any dynamical system and is explicitly given. Moreover, its tuning is reduced to the choice of two real numbers. The performances of the proposed observer are demonstrated in simulation through an illustrative example

Mots clés: Nonlinear system; High gain observer; Unknown inputs

Domaines: Automatique / Robotique

Moncef Triki, Mondher Farza, Tarek Maatoug, Mohammed M'Saad, Yassine Koubaa, et al.. Unknown inputs observers for a class of nonlinear systems. International Journal on Sciences and Techniques of Automatic control & computer engineering, 2010, 4, pp. 1218-1229. ⟨hal-01148741⟩