In a "closed loop" control system, how is the control behavior characterized?

In a "closed loop" control system, the control behavior is characterized as automatic. This system continuously monitors the output and compares it with the desired setpoint. It uses feedback to adjust the input or control variable, ensuring that the system remains stable and operates effectively towards achieving the set goal.

For example, in a temperature control system, if the actual temperature deviates from the setpoint, the closed loop control will automatically adjust the cooling or heating input to bring the temperature back to the desired level. This automatic adjustment is a defining feature of closed loop systems, making them more precise and effective for maintaining specific conditions compared to systems that do not utilize feedback mechanisms.

In contrast, other options like intermittent, manual only, or both automatic and manual do not fully capture the essence of closed loop behavior, which relies primarily on automation to regulate and adjust system performance.