Linköpings Universitet

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An observer for semi-explicit differential-algebraic systems

In this paper we consider design of observers for non-linear models containing both dynamic and algebraic equations, so called differential-algebraic equations (\DAE{}) or descriptor models. The observer is formulated as a \DAE{} and the main results of the paper include conditions that ensure local stability of the observer and also that the observer has index~$1$. Design methodology is presented and illustrated using a small simulation study.

Erik Frisk and Jan Åslund

IFAC World Congress, 2005

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