started implementing turbine and controller code

Regler/Regler_class_file.py

@@ -0,0 +1,35 @@
+import numpy as np
+#based on https://en.wikipedia.org/wiki/PID_controller#Discrete_implementation
+
+
+class P_controller_class:
+    def __init__(self,setpoint,proportionality_constant):
+        self.SP = setpoint
+        self.Kp = proportionality_constant
+        self.error_history = [] 
+        self.control_variable = 0.1
+        self.lower_limit = -0.1   # default
+        self.upper_limit = +0.1   # default
+
+    def set_control_variable_limits(self,lower_limit,upper_limit):
+        self.lower_limit = lower_limit
+        self.upper_limit = upper_limit
+
+    def calculate_error(self,process_variable):
+        self.error = self.SP-process_variable
+        self.error_history.append(self.error)
+
+    def get_control_variable(self):
+        new_control = self.control_variable+self.Kp*(self.error_history[-1]-self.error_history[-2])
+        if new_control < self.lower_limit:
+            new_control = self.lower_limit
+
+        if new_control > self.upper_limit:
+            new_control = self.upper_limit
+
+        self.control_variable = new_control
+        # print(new_control)
+        return new_control
+
+
+