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

Matlab question

  1. Jul 16, 2008 #1
    alright ive got to model a PMDC motor and a mechanical system attached to it

    this is what i have so far for the equations part, which is where the problem is (im trying to graph the time histories of the 3 DE's)

    the bolded part is where the problem is. if i substitute it for a constant number, say 10, the graphs are good.

    i suck at matlab, never understood it, im confused, what do i do?
  2. jcsd
  3. Jul 17, 2008 #2
    never mind, my mind kicked in in the clutch and i got it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook