1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Transfer function and laplace

  1. Jan 5, 2013 #1
    1. The problem statement, all variables and given/known data

    Consider this control system below:


    R = set point
    E = remaining error
    V = interference

    My question is, if both R and V are unit step [itex]\frac{a}{s}[/itex], what will the value of U be when time t[itex]\rightarrow[/itex][itex]\infty[/itex] ?

    2. Relevant equations

    This question is based on the final value theorem of Laplace transform such as:


    Other relevant transfer functions:



    3. The attempt at a solution


    Is that an ok solution?
    The question is how do I use the final value theorem if BOTH signals are step? I know how to do it with one signal, that's easy, but how do I calculate when two signals are step?
    I have no answer to this question, but rather asking how I should approach these kind of problems.
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted