What is the principle difference between an open loop and a

What is the principle difference between an open loop and a closed loop system?

Solution

An open loop control system takes input under consideration and free from any feedback for it\'s output . This is also known as non feedback control system . Principally this has the set point which actuated controller then the actuator and followed by process which controls the control variable. The closed loop also known as feedback control system.Output is referred for modifying the condition . Input is not referred. It is free of any external or internal disturbances .