Georg_Brantegger/Python-DT_Slot_3
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first attempt at involving a Pegelregler in the system

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Georg ´Brantegger
2022-07-21 15:27:36 +02:00
parent 2331c7cc5b
commit 5835c05af9
5 changed files with 137 additions and 120 deletions
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20
Regler/Regler_class_file.py
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@@ -74,15 +74,15 @@ class P_controller_class:
class PI_controller_class:
def __init__(self,setpoint,proportionality_constant,Ti, timestep):
def __init__(self,setpoint,deadband,proportionality_constant,Ti, timestep):
self.SP = setpoint
self.db = deadband
self.Kp = proportionality_constant
self.Ti = Ti
self.dt = timestep
self.error_history = [0]
self.control_variable = 0.0
self.cv_lower_limit = -1 # default
self.cv_lower_limit = 0 # default
self.cv_upper_limit = +1 # default
@@ -91,12 +91,12 @@ class PI_controller_class:
self.cv_upper_limit = upper_limit
def calculate_error(self,process_variable):
self.error = self.SP-process_variable
self.error = process_variable-self.SP
self.error_history.append(self.error)
def get_control_variable(self):
# if np.isclose(self.error,0,atol = 0.1):
# self.control_variable = 0
def get_control_variable(self,process_variable):
self.calculate_error(process_variable)
cv = self.control_variable
Kp = self.Kp
@@ -105,7 +105,11 @@ class PI_controller_class:
e0 = self.error_history[-1]
e1 = self.error_history[-2]
new_control = cv+Kp*(e0-e1)+dt/Ti*e0
if abs(self.error) > self.db:
new_control = cv+Kp*(e0-e1)+dt/Ti*e0
else:
new_control = cv
if new_control < self.cv_lower_limit:
new_control = self.cv_lower_limit