How to adjust: Guide by symptom type
→ Want to suppress temperature vibration (hunting)
→ I want to suppress over
→ I want to speed up the settling time.
Want to suppress temperature vibration (hunting)
Adjustments begin with suppressing vibration during stability control.
The ratio of I to D is generally 4:1 to 6:1, but in rare cases, D may be large.
It may be set.
This can cause vibration, so make D smaller.
The value of P is also parameter related to vibration, but by observing the output movement,
Try to decide whether to make P smaller or larger. (See the video for details.)
I want to suppress over
Once you have suppressed vibration, move on to adjusting over.
If P is small, the output will be as high as the set value.
This will cause over, so let's increase P.
In this case, I and D are often set small, so
Try increasing P, I, and D by the same amount.
On the other hand, if P is too large, the movement to reduce output will be sluggish.
This can also cause over, so consider reducing P.
If attenuation vibration occurs,
Try keeping P constant and increasing I and D by the same proportion. (See the video for details.)
Want to speed up settling time?
If you control in winter with the PID value adjusted in summer,
Settling time may be slower.
This is not simply due to the low temperatures,
The cause is that the regulator is suppressing the output too much.
In this case, either reduce I and D by the same ratio, or
Depending on the severity, try reducing P, I, and D by the same amount. (See the video for details.)
*This is only an example when using a Chino regulator.
*Please note that the PID values listed are based on the experimental data in the video and may behave differently depending on the device you are using.
*For the initial PID value, use the "auto tuning value" or the "PID value of a similar system."
*To "make it larger" or "make it smaller" in the text, you can adjust it in the same way as "make it twice as large as it is now" or "make it half as large as it is now."
Adjust it like a weight on a balance scale.
*The ratio of I to D should basically be 4:1, and the maximum ratio should be within the range of 6:1 to 10:1.
Adjustment example 1: Reduce large vibration by reducing P
Adjustment example 2: Reduce large vibration ② Increase P
Adjustment example 3: When there is a sudden over, increase P, I, and D at the same rate.
Adjustment example 4 over caused by slow output drop Reduce P②
Adjustment example 5: Reaching the goal, but making many detours Increase I and D at the same rate
Adjustment example 6: The brakes are too strong! Repeated foot-stomping Reduce D
Adjustment example 7: The pace is slow and it is difficult to reach the goal. Reduce I and D by the same ratio.
Tuning example 8: It's too slow. Is the output too small? Reduce P, I, and D by the same ratio.
