Closed loop control system

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A closed loop control system is a system in which control action is dependent on the desired output. In this system, the output signal is compared with the reference input signal, and an error signal is produced then this error signal is fed to the controller to reduce the error to obtain the desired output.

control systems Introduction
Examples
Automatic electric iron.
Servo voltage stabilizer.
An air conditioner.
Advantages of closed-loop systems
These systems are more reliable.
Closed-loop systems are faster.
Many variables can be handled simultaneously.
Optimization is possible.