Find a PID Controller

11 views (last 30 days)
River Rock
River Rock on 24 Dec 2012
Hi
I want to find a PID Controller for the following process:
Hp(s) = 1 / (s^2 + 1)
or Hp = tf (1, [1 0 1] );
Performance requirements: overshoot < 5%, settling time < 3 sec, steady-state error = 0.
I tried to use pidtool(H) and none of the available pid types meet the performance requirements.
Do you have any suggestion on how to find the optimal controller using Matlab / Simulink ?
Thanks

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 24 Dec 2012
Edited: Azzi Abdelmalek on 24 Dec 2012
Hp=tf (1, [1 0 1] );
[kpid,info] = pidtune(Hp,'pid')
Then simulate your system using tune (in PID block) to find the desired values of kp ki and kd
you will find approximately
kp=83
ki=19
kd=32
  2 Comments
Azzi Abdelmalek
Azzi Abdelmalek on 25 Dec 2012
Edited: Azzi Abdelmalek on 25 Dec 2012
You have to do it manualy, adjust the time (lower then expected) then decrease the kp to reduce the overshoot

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!