On emulated nonlinear reduced-order observers for networked control systems

Romain Postoyan (1) , Dragan Nesic (2)

1 CRAN - Centre de Recherche en Automatique de Nancy
2 Department of Electrical and Electronic Engineering [Melbourne]

We consider a general class of nonlinear reduced-order observers and show that the global asymptotic convergence of the observation error in the absence of network-induced constraints is maintained for the emulated observer semiglobally and practically (with respect to the maximum allowable transmission interval) when system measurements are sent through a communication channel. Networks governed by a Lyapunov uniformly globally asymptotically stable protocol are investigated. Our results can be used to synthesize various observers for networked control systems for a range of network configurations, as we illustrate it by considering classes of immersion and invariance observers which include the circle-criterion observers.

Mots clés: Networked control systems; Observers; Nonlinear; Stability

Domaines: Automatique / Robotique

Romain Postoyan, Dragan Nesic. On emulated nonlinear reduced-order observers for networked control systems. Automatica, 2012, 48 (4), pp.645-652. ⟨10.1016/j.automatica.2012.01.017⟩. ⟨hal-00675234⟩