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: Control theory

  1. Oct 21, 2007 #1
    1. The problem statement, all variables and given/known data

    I have a transfer function [itex]G(s) = \frac{1}{s^2}[/itex] and a PI controller [itex]P(s) = 6 \left( 1 + \frac{1}{s} \right)[/itex].

    How do I check for stability? Just use 1 + P(s)G(s) = 0 and check the roots?
     
  2. jcsd
  3. Oct 23, 2007 #2

    CEL

    User Avatar

    Yes, if all the roots have a negative real part the system is stable.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook