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Institut für Allgemeine Elektrotechnik, Uni Rostock - Universität ...

Institut für Allgemeine Elektrotechnik, Uni Rostock - Universität ...

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Recursive Time Integration Method<br />

Formal solution of the initial value problem:<br />

()<br />

( 0)<br />

( ( ) ( ))<br />

y t = y + Ay t' + q t' dt'<br />

Prof. Dr. Ursula van Rienen, <strong>Uni</strong>versität <strong>Rostock</strong>, Fakultät <strong>für</strong> Informatik und <strong>Elektrotechnik</strong> (IEF), <strong>Institut</strong> <strong>für</strong> <strong>Allgemeine</strong> <strong>Elektrotechnik</strong> (IAE)<br />

∫<br />

t<br />

t<br />

0<br />

Exact solution of these large systems (complete decomposition in<br />

eigenvector basis or exponential matrix of A) not possible in<br />

practical applications. Therefore: recursive solution. We distinguish:<br />

i explicite<br />

and implicite recursion, depending on the formula for a<br />

new value: explicite or affording to solve an equation or a system<br />

of equations<br />

i single and multi ple step method s, depending<br />

on the number of<br />

old values taken into account. Linear single step methods may be<br />

( m + 1) ( m ) ( m )<br />

written as y = Gy + q with the recursion matrix G.<br />

12

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