Which of the following best defines a closed-loop control system?

A closed-loop control system is characterized by its use of feedback to continuously monitor and adjust its input based on the output it produces. This feedback mechanism allows the system to self-correct errors and maintain the desired performance or setpoint despite any disturbances or variations in the system or the environment.

In such a system, sensors measure the output and provide this information back to a controller, which then makes necessary adjustments to the input. This creates a loop where the output influences the input, allowing the system to adapt dynamically and improve accuracy and stability.

This concept is fundamental in control systems because it allows for real-time adjustments that help achieve desired outcomes, leading to more efficient and reliable operations, especially in dynamic environments.