比利时vs摩洛哥足彩
,
university of california san diego
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math 295 - mathematics colloquium
roland w. freund
university of california, davis
pade-type reduced-order modeling of higher-order systems
abstract:
a standard approach to reduced-order modeling of higher-order linear dynamical systems is to rewrite the system as an equivalent first-order system and then employ krylov-subspace techniques for reduced-order modeling of first-order systems. while this approach results in reduced-order models that are optimal in a pade sense, in general, these models do not preserve the form of the original higher-order system. \vskip .1in \noindent in this talk, we present a new approach to reduced-order modeling of higher-order systems based on projections onto suitably partitioned krylov basis matrices that are obtained by applying krylov-subspace techniques to an equivalent first-order system. we show that the resulting reduced-order models preserve the form of the original higher-order system. moreover, possible additional properties such as passivity or reciprocity are also preserved. while the resulting reduced-order models are no longer optimal in the pade sense, we show that they still satisfy a pade-type approximation property. we also discuss some implementation details and present some numerical examples.
host: james bunch
december 9, 2004
3:00 pm
ap&m 6438
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