negative P gain for PID

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M Gokul
M Gokul 2016-5-26
评论： Anthony Amorosi 2021-1-11
i had used the PID tuner app for matlab and I got the proportional gain to negative (-474) but integral and derivative gains to be positive. Wat all can be done next in order to know whether my PID controller is physically realisable or not?

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Arkadiy Turevskiy
Why are you worried that your controller would not be physically realizable? Negative Kp does not mean controller is unstable.
  2 个评论
M Gokul
M Gokul 2016-6-1
Thank you for the help. I got it rectified.
Anthony Amorosi
Anthony Amorosi 2021-1-11
Hi there,
Sorry to bring this old old topics back to live, but could you elaborate a bit on that ?
How do you physically build a PID controller with a negative P gain but positive I & D gains ?
Thanks, Anthony.

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