Abstract

One of the di culties of the numerical integration methods for di eren tial algebraic equations DAEs is computing consistent initial values be fore starting the integration i e calculating values that satisfy the given algebraic constraints as well as the hidden constraints if higher index prob lems are considered This paper presents an approach to calculate consistent initial values for index DAEs starting up from possibly inconsistent ones Firstly the idea is exposed for linear DAEs and then it is shown how the results can be applied to those systems arising from modi ed nodal analysis MNA in circuit simulation This article starts up from and Several denotations and results we use were introduced there in more detail

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