jens
1170718c3b
A ramp step whose target is below the current actual temperature can only be reached by ambient cooling - the heater can't actively cool. SudTask now detects this once per ramp phase and calls the controller's new set_cooling() override (forces y=0, bypassing the FSM) instead of waiting for its hysteresis-based IDLE transition. The GUI shows a blinking blue "Cool down" label in the status bar while this is active. Progression already only advances once theta_ist matches theta_soll regardless of direction, so no change was needed there.
130 lines
3.1 KiB
Python
130 lines
3.1 KiB
Python
from components import APid
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from components.pid.pid import Pid
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import enum
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DEFAULT_THRESHOLDS = {
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"HoldIdle": 0.1,
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"HoldHeat": 1.0,
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"IdleHeat": 1.0,
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"IdleHold": 0.1,
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"HeatHold": 1.0,
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"HeatIdle": 1.0
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}
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class States(enum.Enum):
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INIT = -1,
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IDLE = 0,
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HEAT = 1,
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HOLD = 2
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class TempControllerBase(APid):
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def __init__(self, dt, params):
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APid.__init__(self)
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self.pid_hold = Pid(dt)
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self.pid_rate = Pid(dt)
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self.theta_ist_set = 0
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self.theta_soll_set = 0
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self.heatrate_ist_set = 0
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self.heatrate_soll_set = 1.0
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self.heatrate_soll = 1.0
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self.theta_ist = 0
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self.heatrate_ist = 0
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self.params = params
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self.thresholds = {**DEFAULT_THRESHOLDS, **params.get('Thresholds', {})}
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self.y = -1
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self.state = States.INIT
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self.pid_hold.set_params(params['Hold'])
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self.pid_rate.set_params(params['Heat'])
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self.is_startup = True
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# Explicit override for a ramp step whose target is below the
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# current temperature: the heater can't actively cool, so rather
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# than wait for the FSM's own (slower, hysteresis-based) IDLE
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# transition, force y to 0 as soon as the caller (SudTask) knows
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# the step needs to passively cool down.
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self.cooling = False
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def on_state_entered(self, state):
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pass
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def post_pid(self):
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pass
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def set_theta_ist(self, value):
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self.theta_ist_set = value
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if self.is_startup:
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self.is_startup = False
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def get_theta_ist(self):
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return self.theta_ist
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def set_heatrate_ist(self, value):
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self.heatrate_ist_set = value
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def get_heatrate_ist(self):
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return self.heatrate_ist
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def set_theta_soll(self, value):
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self.theta_soll_set = value
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def get_theta_soll(self):
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return self.theta_soll
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def get_theta_soll_set(self):
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return self.theta_soll_set
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def set_heatrate_soll(self, value):
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self.heatrate_soll_set = value
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def set_cooling(self, value):
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self.cooling = value
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def get_heatrate_soll(self):
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return self.heatrate_soll
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def get_heatrate_soll_set(self):
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return self.heatrate_soll_set
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def process_fsm(self, diff):
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state_next = self.state
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if self.state == States.INIT:
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if not self.is_startup:
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state_next = States.IDLE
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elif self.state == States.IDLE:
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if diff >= self.thresholds['IdleHeat']:
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state_next = States.HEAT
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self.pid_rate.reset()
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elif diff >= -self.thresholds['IdleHold']:
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state_next = States.HOLD
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self.pid_rate.reset()
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elif self.state == States.HOLD:
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if diff >= self.thresholds['HoldHeat']:
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state_next = States.HEAT
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self.pid_rate.reset()
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elif diff <= -self.thresholds['HoldIdle']:
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state_next = States.IDLE
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elif self.state == States.HEAT:
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if diff <= -self.thresholds['HeatIdle']:
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state_next = States.IDLE
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elif diff <= self.thresholds['HeatHold']:
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state_next = States.HOLD
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self.pid_hold.reset()
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if state_next != self.state:
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self.state = state_next
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self.on_state_entered(state_next)
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def process_pid(self, theta_err, heatrate_err, hold_scale=1.0):
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self.pid_hold.process(theta_err, -self.theta_ist, hold_scale)
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self.pid_rate.process(heatrate_err, -self.heatrate_ist)
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if self.state == States.IDLE or self.cooling:
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self.y = 0
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else:
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self.y = self.pid_rate.get_y()
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self.post_pid()
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def get_power(self):
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return self.y
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