Open Loop Control System

This is a control term.

In any control system you have an 'input', 'process' and 'output'

But there is fourth item that may - or may not - be present. This item is called 'feedback'.

Feedback is a method of letting the input know what the output is doing. This means feedback can affect the way the control system works.

A control system is said to be 'closed loop' if it includes feedback

A control system is said to be 'open loop' of it does not contain feedback.

An example of an open loop system is a microwave oven that simply runs for a given time and then stops. It does not care if the food if OK, raw or burnt!

Challenge see if you can find out one extra fact on this topic that we haven't already told you

Click on this link: Open Loop Control System


back to glossaryback to glossary