How to define transfer function into the tf or ss format

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Ce Shang
Ce Shang 2012-4-29
If a transfer function is given like Lt(s) = F*(s*I-A)^(-1)*B, how to get its relative tf() or ss() format so that bodeplot or nyquist can be used? Thx.

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Arkadiy Turevskiy
Arkadiy Turevskiy 2012-4-30
sys=ss(A,B,C,0);
bode(sys);
nyquist(sys);
HTH. Arkadiy

更多回答（1 个）

Honglei Chen
Honglei Chen 2012-4-29
This is already in state space form. Your A,B,F are just A,B,C. Your D is 0
http://lpsa.swarthmore.edu/Representations/SysRepTransformations/TF2SS.html

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