After reading this topic Closed loop or feedback control system, you will understand the theory, examples, advantages, disadvantages, and comparison.
It is a control system in which the control action dependents on both the output signal and the input signal. It is shown below in Figure 1.
As compared with the open-loop control system, an additional feedback feature in the closed-loop control system results in the relationship between the output and the input.
Examples
Some of the most common examples in our surrounding as
- Automatic electric iron.
- A missile launcher system.
- DC motor speed control.
Advantages
- Accurate and reliable
- External noise and disturbance effects are insensitive due to the presence of feedback.
Disadvantages
- The system is complex and costly
- Complicate for maintenance
- They are less stable under certain conditions.
