Electrical Engineering ⇒ Topic : Elements of a control system

Elements of a control system:-

Controlled variable:- The quantity or condition of the controlled system which can be directly measured and controlled is called controlled variable.

Indirectly controlled variable:- The quantity or condition related to controlled variable, but cannot be directly measured is called indirectly controlled variable.

Comnand:- The input which can be independently varies is called command.

Reference input:-  A standard signal used for comparison in the closed loop system.

Actuating signal:- The difference between the feedback signal and reference signal is called actuating signal.

Disturbance:- Any signal other than the reference which affects the system performance is called disturbance.

System error:- The difference between the actual value and ideal value is called system error. The negative value is called derivation.