Linköpings Universitet

Abstract

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Observers for non-linear 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 obsverver 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.

Jan Åslund and Erik Frisk

2004

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