Definition:An open-loop controller, also called a non-feedback controller, is a type of controller that computes its input into a system using only the current state and its model of the system. An open-loop controller is often used in simple processes because of its simplicity and low cost, especially in systems where feedback is not critical. A typical example would be a conventional washing machine, for which the length of machine wash time is entirely dependent on the judgment and estimation of the human operator
An open loop system
CLOSED LOOP SYSTEM & SCHEMATIC DIAGRAM
Definition:
A type of control system that automatically changes the output based on the difference the feedback signal to the input signal.
A closed loop system
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