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Electronics => Electronics => Topic started by: rabochid on December 07, 2010, 04:05:18 AM

Title: Kp Ki and Kd
Post by: rabochid on December 07, 2010, 04:05:18 AM

how to define the coefficients Kp, Ki and Kd of a PID without knowing the characteristics of my dc motor

Title: Re: Kp Ki and Kd
Post by: waltr on December 07, 2010, 08:22:21 AM

You can't.
You can either take a first guess at the values one at a time or model that entire motor/feedback SYSTEM to calculate starting values.
Look up PID tuning. There are many articles on how to do this.

Title: Re: Kp Ki and Kd
Post by: rabochid on December 08, 2010, 12:42:04 PM

I think I can do it with the method of ziegler nichols
http://en.wikipedia.org/wiki/Ziegler%E2%80%93Nichols_method (http://en.wikipedia.org/wiki/Ziegler%E2%80%93Nichols_method)