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

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

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Backward-Difference Quotient<br />

Im<br />

( λ G ) ( ωΔt) max<br />

1<br />

Eigenvalues always lay inside of<br />

( ω Δ t) = 0<br />

the (shaded) stability area with λ ≤ 1.<br />

( )<br />

1<br />

Yet, accuracy depends Reon<br />

λGΔ<br />

t<br />

why a time step control is necessary.<br />

G<br />

Im<br />

( λ )<br />

G<br />

1<br />

( ωΔ t) max<br />

( ωΔ t) = 0<br />

−( ωΔ t) max<br />

Re( λG)<br />

1<br />

−<br />

( ωΔt) max<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 />

19

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