Initial-boundary value problems of warped MPDAEs including minimisation criteria

R. Pulch

Mathematics and Computers in Simulation (MATCOM), 2008, vol. 79, issue 2, 117-132

Abstract: Electric circuits, which produce oscillations at widely separated time scales, cause a huge computational effort in a numerical simulation of the mathematical model based on differential-algebraic equations (DAEs). Alternatively, a multidimensional signal model yields a description via multirate partial differential-algebraic equations (MPDAEs). Initial-boundary value problems of the MPDAE system reproduce solutions of the underlying DAE system. In case of frequency modulation, an additional function occurs in the MPDAE model, which represents a degree of freedom in the multivariate description of the signals. We present two minimisation strategies, which are able to identify the additional parameters such that the resulting solutions exhibit an elementary structure. Thus numerical schemes can apply relatively coarse grids and an efficient simulation is achieved.

Keywords: Multirate partial differential-algebraic equation; Initial-boundary value problem; Variational calculus; Method of lines; Frequency modulation (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:79:y:2008:i:2:p:117-132

DOI: 10.1016/j.matcom.2007.10.006

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