Two compounding problems, found by actually running it:
- pot_mass=1/water_mass=1 (~2kg) is far lighter than the mass the real
PID gains are tuned for (~30kg, matching the real recipes) - same
heater power swings a 2kg pot far faster than the gains expect,
causing massive overshoot (24 -> 37.5 instead of holding at 24).
Fixed by using the same realistic mass as sud_0010.json/sud_0020.json.
- The overshoot then needed a passive cooldown back down to the next
step's target - independent of any declared rate, governed by the
plant's L/C time constant (~350 min here), regardless of mass.
Removed the (now unnecessary, since the overshoot is gone) explicit
cooldown step too.
Predicted/actual duration drops from ~408 min to ~18-21 min - verified
both via components/sud_forecast.py's estimator and a live run against
the real server (reaches DONE, no controller chattering).
jens
df2be52298