04/18/23

A Model of Control Systems Theory

Reference Input:Ideal value or goal state

Comparator:Actual - Reference

Action System

Output:Results of the Systems actions

Input:Values related togoal state

Sensor:Detect Input

Disturbance:Influences from outside the system

04/18/23

CST and the Themostat

Reference Input:Thermostat =72o

Comparator:72-65 = -7

Action System:Furnace is turned on

Output:Hot air is blownout of vents

Input:Air temperature65o

Sensor:Thermometer at wall

Disturbance:e.g. open window

04/18/23

CST and the Thermostat

Reference Input:Thermostat =72o

Comparator:72-73 = 1

Action System:Furnace is turned off

Output:No hot air

Input:Air temperature73o

Sensor:Thermometer at wall

Disturbance:e.g. open window

04/18/23

Midsagittal Cut

04/18/23

Bottom of the Brain

04/18/23

Preoptic Area

04/18/23

CST and Eating

Reference Input:Reference Caloriesand Fat signal forWeight = 150

Comparator:Structures inHypothalamus

Action System:Controls MetabolismRate of Burning Fat

Output:Signal aboutfuel level and State of Fat Cellswhich stimulate hunger

Input:Calories Per daySignals from StomachSignals from Fat

Sensors:Brain, stomach others

Disturbance:vomiting (Decreasesinput)Exercise (IncreaseMetabolism