Files
brewpi/components/pid/temp_controller.py
T
jensandClaude Sonnet 4.6 1e89a58370 Replace Pid.scale()'s mutable gain factor with a stateless process() arg
Pid.scale(k) set self.k as persistent state, mutated from outside the
class and never reset in reset(), so a stale scale factor could survive
a state-transition reset. Replace it with a plain scale=1.0 argument on
Pid.process(), and have temp_controller.py/temp_controller_smith.py
compute the heat-rate-overshoot compensation factor themselves and pass
it through process_pid() each tick instead of mutating pid_hold's state.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-06-19 17:37:55 +02:00

30 lines
963 B
Python

from components.pid.temp_controller_base import TempControllerBase
class TempController(TempControllerBase):
def __init__(self, dt, params):
TempControllerBase.__init__(self, dt, params)
self.dt = dt
self.last_theta_ist = 20
self.heatrate_ist = 0
def process(self):
# Process Kalman
self.theta_ist = self.theta_ist_set
heatrate = (self.theta_ist - self.last_theta_ist)/self.dt*60
alpha = 0.1
self.heatrate_ist = (1-alpha) * self.heatrate_ist + alpha*heatrate
self.last_theta_ist = self.theta_ist
# Compensate for max heat rate to reduce overshoot
hold_scale = 1.0/self.heatrate_soll_set if self.heatrate_soll_set > 0 else 1.0
self.heatrate_soll = self.heatrate_soll_set * self.pid_hold.get_y()
theta_err = self.theta_soll_set - self.theta_ist
heatrate_err = self.heatrate_soll - self.heatrate_ist
diff = self.theta_soll_set - self.theta_ist
self.process_fsm(diff)
self.process_pid(theta_err, heatrate_err, hold_scale)