Results 1 to 3 of 3

Math Help - Laplace -> time domain

  1. #1
    Newbie
    Joined
    Aug 2008
    Posts
    3

    Unhappy Laplace -> time domain

    heyya, I'm doing a major piece of coursework and I cant convert my S domain function back to time domain.


    this is the equasion, I'm limited to only using certain transforms (listed below), I've tried everything i can think of, but it's just not going my way.

    thanks for any help =D

    Dead.Rabit

    list of permited transforms:
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Newbie
    Joined
    Aug 2008
    Posts
    3
    An alternative method of looking at it, if your not to firmiliar with laplace transforms then...



    rearange : 1/s x 4/S^2+4
    into the form : K1/S + K2w/S^2+w^2

    thanks D.R

    [EDIT] sorry, i should of been more clear, the two K's are different so i relabeled them K1 and K2
    Last edited by deadrabit; November 8th 2008 at 03:35 PM.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by deadrabit View Post
    An alternative method of looking at it, if your not to firmiliar with laplace transforms then...



    rearange : 1/s x 4/S^2+4
    into the form : K1/S + K2w/S^2+w^2

    thanks D.R

    [EDIT] sorry, i should of been more clear, the two K's are different so i relabeled them K1 and K2
    The partial fraction decomposition should be routine: \frac{4}{s(s^2 + 4)} \equiv \frac{1}{s} - \frac{s}{s^2 + 2^2}.

    The inverse transform of this should be obvious: 1 - \cos (2t).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 11
    Last Post: January 12th 2011, 07:49 PM
  2. Replies: 3
    Last Post: December 6th 2010, 03:52 AM
  3. Shifting from Laplace to time domian and then Z transform
    Posted in the Advanced Applied Math Forum
    Replies: 3
    Last Post: June 21st 2010, 11:37 PM
  4. time domain analysis from pressure sensor
    Posted in the Math Software Forum
    Replies: 2
    Last Post: March 19th 2010, 10:00 AM
  5. Frequency dependent output (Laplace domain)
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: December 7th 2009, 06:40 AM

Search Tags


/mathhelpforum @mathhelpforum