Author Topic: Need Help for PID Control!  (Read 1650 times)

0 Members and 1 Guest are viewing this topic.

Offline arigidTopic starter

  • Jr. Member
  • **
  • Posts: 22
  • Helpful? 0
Need Help for PID Control!
« on: October 28, 2011, 04:10:28 PM »
Hey, I was working on a robot to follow a Line, However i thought of adding the PID Control to it, to make it go more smooth, Can anyone suggest on hold to Calculate the Kp,Kd,Ki Value for my Robot. Thanks!
Logged

Offline waltr

  • Supreme Robot
  • *****
  • Posts: 1,944
  • Helpful? 99
Re: Need Help for PID Control!
« Reply #1 on: October 28, 2011, 06:16:53 PM »
The PID coefficients are usually determine by trial. Starting with them set to 1 or 0 then working on Kp then Kd then Ki. There are a number of references on going about this. One is in Wikipedia, others are found with Google and also have been several discussion on SoR that you can find with a search.

One thing that helps is being about to measure the control loop's response so that you know how much a change to a coefficient effects the loop. One way to do this is sample at regular time intervals the feed-back value and the output value of the PID control loop then send these out the serial port to a PC. On the PC have a program (can be a terminal program) that writes the values to a file or if you can write the program graph the data value. Or, graph the value written to the file in Excel.
Logged

Offline RITESH29

  • Robot Overlord
  • ****
  • Posts: 155
  • Helpful? 0
Re: Need Help for PID Control!
« Reply #2 on: October 29, 2011, 10:50:27 PM »
It is nice to use PID but even i have no idea how to use it...!!
Logged
 

Get Your Ad Here