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How to write the Laplace symbol s in trigonometric function?

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Siyu He
Siyu He 2015-6-19
评论： Siyu He 2015-6-19
Hi,
I am trying to express a transfer function, which has the Laplace symbol s in a sine function. I am wondering how to express this in Matlab? The transfer function is:
I wrote is as
ms=(3.77-0.034)/2.5e-6; K1=sin(s*Toff/(2i))*asin(s*(Ton+Toff)/(2i))*(Ton+Toff)/Toff;
Fm=Toff/(ms*(Ton+Toff)^2)*K1*exp(s*Ton/2);
However, Matlab can not recognize this code.
Please help me with this question.

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回答（1 个）

Walter Roberson
Walter Roberson 2015-6-19
If you have the symbolic toolbox then proceed those lines with
syms s
  1 个评论
Siyu He
Siyu He 2015-6-19
Thanks Walter.
I have the symbolic toolbox, but I need this transfer function to be plotted by command bode(); Can I still use the syms s?

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