Delay and state observer for SISO LTI systems

Vincent Léchappé (1) , Jesus de Leon (2) , Emmanuel Moulay (3) , Franck Plestan (1) , Alain Glumineau (1)

1 IRCCyN - Institut de Recherche en Communications et en Cybernétique de Nantes
2 UANL - Universidad Autonoma de Nuevo Leon [Mexique]
3 XLIM-SIC - SIC

This paper deals with the problem of state and delay estimation for SISO LTI systems, with unknown time-varying delay in the input. Thanks to an adequate approximation of the delayed input by the Taylor’s theorem, an original approach based on observer design is proposed in order to estimate both state and delay. This new technique allows the estimation of time-varying delay. The convergence of the observer is formally proved. The efficiency of the method is widely illustrated by simulations.

Domaines: Automatique

Vincent Léchappé, Jesus de Leon, Emmanuel Moulay, Franck Plestan, Alain Glumineau. Delay and state observer for SISO LTI systems. American Control Conference, Jul 2015, Chicago, United States. ⟨10.1109/ACC.2015.7172051⟩. ⟨hal-01179410⟩