2.5OCNov 2, 2011
Sufficient Conditions on the Existence of Switching Observers for Nonlinear Time-Varying SystemsD. Boskos, J. Tsinias
We derive sufficient conditions for the solvability of the observer design problem for a wide class of nonlinear time-varying systems, including those having triangular structure. We establish that, under weaker assumptions than those imposed in the existing works in the literature, it is possible to construct a switching sequence of time-varying noncausal dynamics, exhibiting the state determination of our system.
2.5OCApr 15, 2012
Observer design for nonlinear triangular systems with unobservable linearizationD. Boskos, J. Tsinias
The paper deals with the observer design problem for a wide class of triangular time-varying nonlinear systems, with unobservable linearization. Sufficient conditions are derived for the existence of a Luenberger-type observer, when it is a priori known that the initial state of the system belongs to a given nonempty bounded subset of the state space. For the general case, the state estimation is exhibited by means of a switching sequence of time-varying dynamics