Which component in a closed-loop system detects errors?

In a closed-loop system, the component that specifically identifies discrepancies between the desired output and the actual output is known as the error detector. This component plays a critical role in the functioning of the system because it constantly monitors the output to assess if it matches the target set by the controller.

When the error detector identifies a deviation, it generates a signal that indicates the nature and magnitude of the error. This information is crucial for the subsequent actions taken within the closed-loop system. The controller receives the error signal from the error detector, processes it, and determines the necessary adjustments needed to bring the system output back to the desired level.

The effectiveness of the closed-loop system often hinges on the precision and response of the error detector, making it an integral part of maintaining system stability and performance.