Open & Closed Loop Control System - Advantages & Disadvantages

Open & Closed Loop System - Advantages & Disadvantages [Control System].

In control systems engineering, a system is actually a group of objects or elements capable of performing individual tasks. They are connected in a specific sequence to perform a specific function.



A system is of 2 types:

  1. Open loop system which is also called as Manual control system.
  2. Closed loop system which is also named as automatic control system.

In this post, we will be discussing various advantages and disadvantages of the 2 types of control systems.

Open Loop System:
Advantages:
  1. Simplicity and stability: they are simpler in their layout and hence are economical and stable too due to their simplicity.
  2. Construction: Since these are having a simple layout so are easier to construct.

Disadvantages:
  1. Accuracy and Reliability: since these systems do not have a feedback mechanism, so they are very inaccurate in terms of result output and hence they are unreliable too.
  2. Due to the absence of a feedback mechanism, they are unable to remove the disturbances occurring from external sources.

Closed Loop System:
Advantages:
  1. Accuracy: They are more accurate than open loop system due to their complex construction. They are equally accurate and are not disturbed in the presence of non-linearities.
  2. Noise reduction ability: Since they are composed of a feedback mechanism, so they clear out the errors between input and output signals, and hence remain unaffected to the external noise sources.

Disadvantages:
  1. Construction: They are relatively more complex in construction and hence it adds up to the cost making it costlier than open loop system.
  2. Since it consists of feedback loop, it may create oscillatory response of the system and it also reduces the overall gain of the system.
  3. Stability: It is less stable than open loop system but this disadvantage can be striked off since we can make the sensitivity of the system very small so as to make the system as stable as possible.

If you have any queries regarding this topic, you can post your comments below and I will make sure your queries are answered well.

43 comments:

  1. Thank you for posting the great content…I was looking for something like this…I found it quiet interesting, hopefully you will keep posting such blogs….Keep sharing

    ReplyDelete
  2. Hello amitbiswal.blogspot.com! My Dad is an electrical engineer and also a mechanical engineer. The Open & Closed Loop System - Advantages & Disadvantages article just opened my mind how a certain design works. I now know that closed loop system is more complex in design and since I am familiar with hi-tech devices as a consumer I am for the close loop system.

    ReplyDelete
  3. thankx for such publish really helps

    ReplyDelete
  4. Thank you for the information.

    ReplyDelete
  5. Thanks for the information.

    ReplyDelete
  6. This is such a Great resource that you are providing and you give it away for free. It gives in depth information. Thanks for this valuable information.

    ReplyDelete
  7. thanks alot for this valuable information.

    ReplyDelete
  8. Anonymous7/03/2012

    I would like to know how feedback loop can create oscillatory response of the system

    ReplyDelete
  9. Anonymous8/02/2012

    Number of fins in FPC for open loop system

    ReplyDelete
  10. Anonymous8/13/2012

    what are the control elements of both

    ReplyDelete
  11. how a open loop is more stable than a close loop system.by making close loop we can make a unstable system to stable also.like if a transfer function is 1/S+1 ,if we make close loop it will become 1/S+2 then close loop pole of the system moving away from imaginary axis and will become more stable also the response time decrease when it becomes close loop. please mail me the answer chhatoi_prabhat@yahoo.co.in i will thank full to you.

    ReplyDelete
    Replies
    1. Thanks for explain looping control

      Delete
  12. Amazing post publish by you , i think it's very effective information share, thanks for sharing a good knowledge.
    closed loop marketing

    ReplyDelete
  13. how to get transfer function from a process

    ReplyDelete
  14. please give me a brief description of equations which are derived from transfer function.

    ReplyDelete
  15. please give me a brief description of equations which are derived from transfer function.

    ReplyDelete
  16. if u don't mind please give the example of open and closed loop system at least 25 examples.

    ReplyDelete
  17. Thankyou for shareing a valueble information

    ReplyDelete
  18. Thank you for shareing valueble information. I think you can give some ex. And give the such as reasion put on that it's very useful. Thankyou.

    ReplyDelete
  19. Anonymous1/29/2013

    Thanks a lot. How does the feedback reduce the overall gain of the system in close loop system.

    ReplyDelete
  20. Anonymous2/15/2013

    what is differne between the control system and communication systems \

    ReplyDelete
  21. Anonymous3/24/2013

    Excatly what I needed, what a good post

    ReplyDelete
  22. Anonymous7/23/2013

    This comment has been removed by a blog administrator.

    ReplyDelete
  23. Anonymous7/23/2013

    first of all i would like to thank you so much for publishing such a good information , secondly can you tell me what kind of them is most frequently used and why ?
    your cooperation is so appreciated
    albhadly87@gmail.com

    ReplyDelete
  24. • Give the examples for the same for day-to-day and industrial applications.

    ReplyDelete
  25. • Give the examples for the same for day-to-day and industrial applications.

    ReplyDelete
  26. Hi Sir, do you modules for Electronic Control Systems? Advantages and Disadvantages of using such system. Thanks!

    ReplyDelete
  27. thank you too mach and could you list biomedical equipments related to that

    ReplyDelete
  28. Thank tou all of tou to share information about that I hope tou guys still contribute in our student life thank tou keep help people like us.

    ReplyDelete
  29. Thank you for sharing this information... It was very helpful to me :)

    ReplyDelete
  30. thnx for the information ......but i have small confusion if in close loop system stability is less than open loop system than how it is helpfull to the system.....

    ReplyDelete
  31. This comment has been removed by a blog administrator.

    ReplyDelete
  32. Why open loop system is more stable

    ReplyDelete
  33. Why oscillatory response is disadvantage of closed loop control system

    ReplyDelete
  34. Why oscillatory response is disadvantage of closed loop control system

    ReplyDelete
  35. This comment has been removed by a blog administrator.

    ReplyDelete
  36. This comment has been removed by a blog administrator.

    ReplyDelete
  37. Thank you so much for your explanations for expressing open and closed loop, may i ask you how system became closed loop makes the system less stable ?? and explanation of oscillatory respone.
    Hope you mail me.
    egyptme2011@gmail.com

    ReplyDelete

If you liked this blog then Join me at:
Facebook
Twitter