4 ms·
I read this in a magazine years ago, super helpful. I learned the most when I sat down and worked though it by hand. In practice, I've never needed D, PI has
by annoyingnoob 7y ago
I read this in a magazine years ago, super helpful. I learned the most when I sat down and worked though it by hand. In practice, I've never needed D, PI has been enough to do the job.
- ssivark 7y agoIn the typical pedagogy, D is only necessary if you feel the PI isn’t responding fast enough (for rapid control). D, being very sensitive to high frequencies, helps with that.
- themeiguoren 7y agoAnd the reason you’d leave it out is because a PI controller is guaranteed to be stable with positive gains. Throw the D term in there and you have to start checking pole positions to make sure your system doesn’t blow up.
- analog31 7y agoI've seen quite a few control loops where, when you dig down to the inner loop, D is set to zero.