Article ID Journal Published Year Pages File Type
1141249 Mathematics and Computers in Simulation 2008 16 Pages PDF
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.
Related Topics
Physical Sciences and Engineering Engineering Control and Systems Engineering
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