In this article, we will study the what is difference between open-loop and closed-loop control systems.
Let’s compare both systems with multiple specifications.
Difference between Open Loop and Closed Loop Control Systems.
|Open-Loop Control System
|Closed-Loop Control System
What is open loop and closed loop control system?
|The control system in which input or controlling action does not depend on the output is called an Open-loop control system.
|The control system in which input or controlling action depends on the output is called an Closed-loop control system.
|Sometimes, an Open-loop control system is called a Non-feedback system.
|A closed-loop control system is called as Feedback system.
|The construction of an open-loop control system is very simple.
|The construction of an open-loop control system is very complex.
|Mainly, two components (like controller and the controlled process) are included in an open-loop control system.
|More componenets (like controller, feedback, comparator,etc) are included in closed-loop control system.
|Required Additional System
|This system does not consist of a feedback loop.
|This system consists of a feedback loop to control the state or previous output of the dynamic system.
|Stability of Open-loop & Closed loop systems.
|This system occurs stable in nature.
|This system occurs less stable or unstable in nature under certain conditions.
|The output does not change the action of the control system.
|The output changes the action of the control system.
|Performance of Operation
|Open-loop control system gives the fast response in less time.
|A closed-loop control system gives a slow response in more time.
|The reliability of this control system is less.
|The reliability of this control system is more.
|Effect on both control systems
|Find more internal noise and the effect of parameter variation.
|Find less internal noise and the effect of parameter variation.
|The cost of this system is low.
|The cost of this system is high.
|The open-loop system performs accurately when calibration is good.
|The closed-loop system performs accurately due to the feedback system.
|Less maintenance is required in
open-loop control system.
|More maintenance is required in
closed-loop control system.
|Optimization is not possible in this system.
|Optimization is possible in this system.
15. Block Diagram of Open-Loop & Closed-Loop Control System
- Open-Loop Control System
- Closed-Loop Control System
16. What is the example of an open-loop & closed-loop control system?
Open-loop control system examples:
- Field control DC motor
- Television (TV) remote
- Automatic washing machine
- Automatic traffic light control
- Immersion rod
Closed-loop control system examples:
- Human respiratory system
- Air conditioner (AC)
- DC motor speed control
- Missile launching system
- Radar tracking system
These are all the basic specifications of open-loop vs closed-loop systems with examples. Also, describe the advantages and disadvantages of open and closed-loop control systems.
If you have any queries, you can ask in the comment section.
Thanks for Reading!
I have completed master in Electrical Power System. I work and write technical tutorials on the PLC, MATLAB programming, and Electrical on DipsLab.com portal.
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