MATLAB: Negative P gain for PID

Question

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?

Answer 1

Why are you worried that your controller would not be physically realizable? Negative Kp does not mean controller is unstable.