joukeder skrev:Has anyone experimented with the PID parameters?
Regards
Jouke
The PID has to do with the regulation of effekt, and has as so nothing to do with the oxygen control.
But you probably can have a more smooth effekt curve and a more stable temperature by changing the default settings.
Here are some explanation
P_EFFEKT = GAIN_P * (Target_temp – Actual_temp)
eksempel:
GAIN_P = 10 %/C, target temp = 60 C and actual temp = 58 C
P_EFFEKT = 10 %/C * (60 C – 58 C) = 20 %
I_EFFEKT = GAIN_I * Σ(target_TEMP – actual_TEMP)dt
eksempel:
GAIN_I = 1,0 %/C/MIN, for 20 min the diff between target and actual temp has been 2 C:
I_EFFEKT = 1,0 %/C/MIN * 20 MIN * 2 C = 40 %
D_EFFEKT = -GAIN_D * ( target_TEMP(t) – actual_TEMP(t-1) )
eksempel:
GAIN_D = 10 %/C, temp = 59 C, temp 1 minut ago = 58 C:
D_EFFEKT = - 10 %/C * (59 C – 58 C) = -10 %
The total effekt would be the sum of the 3 parts. P+I+D
In practic is the most importen change that I is lowered from the 100 to about 10 in order to avoid overshoot of temp.
P should be in the range 20-35 and D in the range 0-20
So now you have something to play with.