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!

Droop in Control Theory

  1. Oct 14, 2014 #1
    In control theory, we have the proportional controller which is of the form-
    u(t) = ke
    where e is the error between the current measured value and the required value. The P controller is said to droop. To avoid this, an integral term and a differential term is added. What is this droop?
    I read it in wikipedia but couldn't understand.
  2. jcsd
  3. Oct 19, 2014 #2
    Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Oct 19, 2014 #3


    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    A simple proportional feedback will not completely drive the error to zero. Given a step input, an error will remain and approach a constant. That is the "droop".
    Last edited: Oct 19, 2014
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook