How to use wolfram alpha to plot frequency response

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Discussion Overview

The discussion centers around how to use Wolfram Alpha to plot the magnitude and phase response of a specific transfer function, particularly for users who do not have access to Matlab. The focus includes practical usage of Wolfram Alpha's functions for this purpose.

Discussion Character

  • Technical explanation
  • Homework-related

Main Points Raised

  • One participant requests guidance on plotting the magnitude and phase response of a given transfer function using Wolfram Alpha.
  • Another participant suggests using the functions abs(...) and phase(...) with 'i' as the imaginary unit for plotting.
  • A later reply asks how to plot the phase in degrees instead of radians.
  • Some participants propose using the 'bode(...)' function, which can plot amplitude and phase in degrees and also provides Nyquist and Nichols plots.
  • One participant expresses enthusiasm about the usefulness of the 'bode(...)' function, despite not fully understanding Nyquist and Nichols plots yet.

Areas of Agreement / Disagreement

Participants generally agree on the methods to use in Wolfram Alpha, but there is no consensus on the understanding of all the concepts involved, such as Nyquist and Nichols plots.

Contextual Notes

Some participants may have varying levels of familiarity with the terms and functions discussed, which could affect their understanding and application of the suggestions provided.

Void Xylem
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Can someone please tell me how I can plot the magnitude and phase response of this transfer function on wolfram alpha as I don't have Matlab:

H(s) = -(2.1953*10^12)/(66600*((j*ω)^2)+808823539.4*(j*ω)+2.1626*10^12)

A link to the output would be very useful also, thanks heaps.
 
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You can use abs(...) and phase(...) with i as the imaginary unit.
 
ZVdP said:
You can use abs(...) and phase(...) with i as the imaginary unit.

thanks bro, your post has improved my life quality by a factor of 0.0001, one more question: How do I make it plot the phase in degrees instead of radians.
 
You can also use 'bode (...)', which will plot the amplitude and phase in degrees. As a bonus you get Nyquist and Nichols too :)
 
ZVdP said:
You can also use 'bode (...)', which will plot the amplitude and phase in degrees. As a bonus you get Nyquist and Nichols too :)

haha wow that's really cool, its going to be very useful, i got to admit i have no idea what the Nyquist and Nichols are atm but ill get there eventually. thanks for the help.
 

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