A system is nothing but a set of interconnected components working together to do a specific task.
🌾For example: fan – Components such as condenser, coil, fan blades, etc. put together to circulate air in a room.
(i.e.) just a fan that rotates.
If the behaviour of a system can be controlled by using a device, then the system can be termed as control system.
System: System is the device that needs to be controlled.
Controller: A device or mechanism used to regulate or manipulate the behaviour of the system.
Objectives: Why we need this system for?
Inputs: Based on the objective, controller gives input to the system.
Results: Output of the system based on the controller input.
System: Here the system is the fan
Controller: To control the fan, a regulator is used.
Objectives: We need fan to regulate the air-flow inside the room, thereby maintaining the temperature of the room.
Based on the heat sensed by our body, we determine the rpm of the fan needed, thereby turning the regulator manually.
Inputs: Based on the regulator switch number, the current flow to the coil of the fan is limited.
Results: Speed (RPM) of the fan is controlled.
System: Here the system is the traffic light control.
Controller: To control the traffic lights, a timer is used.
Objectives: We need traffic lights to regulate the traffic. Based on the number of vehicles (predefined), we allocate time in the timer.
Inputs: When countdown is over, the timer triggers the traffic light control to switch the lights.
Results: Traffic light gets switched.