Closed-loop control is a type of control system in which a controller continuously monitors the output of a system and adjusts its input in order to maintain a desired setpoint or achieve a specific objective. This feedback loop allows for real-time adjustments in response to changing conditions, ensuring that the system remains stable and performs optimally. Closed-loop control is commonly used in a wide range of applications, such as industrial automation, robotics, process control, and aerospace engineering. The primary goal of closed-loop control is to maintain desired performance, stability, and reliability in dynamic systems.