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ptc-54307511-Visitor
1-Visitor
January 27, 2014
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MathCad 14 bode plot of exp transfer function

  • January 27, 2014
  • 2 replies
  • 2811 views

Hi,

I am pretty new to MathCad and have difficulties plotting bode plot of exp function. My file is in attachment. Any help would be appreciated.

Thank you.

Best answer by AlanStevens

The attached might help. (I've not bothered to select log scales or use dB's in the attached).

Alan

2 replies

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Werner_E25-Diamond I
25-Diamond I
January 27, 2014

sys1 has to be a function of omega and T, not a variable. --> sys1(omega,T):=...

A
AlanStevens19-TanzaniteAnswer
19-Tanzanite
January 27, 2014

The attached might help. (I've not bothered to select log scales or use dB's in the attached).

Alan

P
ptc-54307511-VisitorAuthor
1-Visitor
January 27, 2014

Thank you. this is what I was searching for. I didnt know how to define magnitude and phase here.

What I dont understand is taha ORIGIN variable. What does it do? Can you explain it to me please? Thank you

A
AlanStevens19-Tanzanite
19-Tanzanite
January 27, 2014

Martin Németh wrote:

Thank you. this is what I was searching for. I didnt know how to define magnitude and phase here.

What I dont understand is taha ORIGIN variable. What does it do? Can you explain it to me please? Thank you

Mathcad counts from 0 by default. You were starting your count from 1. You can set the start to whatever you want by setting the keyword ORIGIN, as I did in the worksheet. If you don't set it to 1 but count from 1 your vectors will contain an unwanted zero as the first element - this might or might not cause problems later.

Alternatively, you could adjust your variables to start counting from 0 and ignore ORIGIN.

Alan

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