What typically happens in the feedback of a control system?

In control systems, feedback is an essential mechanism that helps to ensure the system operates effectively and can adapt to changes. When we say that feedback "senses the output," we are referring to the process by which the system monitors its own output performance in order to make necessary adjustments.

This feedback loop involves measuring the output of the system and comparing it to a desired target or setpoint. If there is a discrepancy between the two, the feedback information is used to make adjustments to the input or other aspects of the system. By sensing the output, the system can maintain stability, improve accuracy, and correct any errors in real-time, ultimately leading to better performance.

Other possible responses do not accurately capture the primary role of feedback in a control system. Amplifying the output does not involve assessment or correction based on performance. Modifying the input and shutting down the system can be actions taken based on feedback, but the essence of feedback is primarily about sensing the output first to inform any further actions.