3 A B C D E F G H I J K L M N O P Q R S T U V W Y

Closed loop control

Closed loop control is a method of automation in which part of the output is fed back to the input to achieve a regulatory action. For example, a closed-loop heating controller might measure a room temperature and switch heating on if the temperature is below target. In contrast, an open control would switch heating on for preset time periods without measuring the temperature.