Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

How to use wolfram alpha to plot frequency response

  1. Aug 26, 2012 #1
    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.
  2. jcsd
  3. Aug 26, 2012 #2
    You can use abs(...) and phase(...) with i as the imaginary unit.
  4. Aug 26, 2012 #3
    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.
  5. Aug 26, 2012 #4
    You can also use 'bode (...)', which will plot the amplitude and phase in degrees. As a bonus you get Nyquist and Nichols too :)
  6. Aug 26, 2012 #5
    haha wow thats really cool, its gonna be very useful, i gotta admit i have no idea what the Nyquist and Nichols are atm but ill get there eventually. thanks for the help.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook