Open-loop control system & closed-loop control system - Manufacturing Processes - 1

Q.  Open-loop control system is
- Published on 03 Aug 15

a. less accurate than closed-loop control system
b. more accurate than closed-loop control system
c. equally accurate to closed-loop control system
d. cannot say

ANSWER: less accurate than closed-loop control system

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    Discussion

  • Pankaj   -Posted on 19 Oct 15
    - In open-loop control system, the control action is independent of the desired output.

    - The actuating signal in an open-loop control system is dependent only on the input command and output doesn't have any control over it.

    - Whereas, the control action is somehow dependent on the output in closed-loop control system. Closed-loop control system is also called as feedback control system. In this system, the controlled output is fed back through feedback elements and compared with the reference point and input is controlled according to the desired output. Thus, it is more accurate than the open-loop control system

    - Therefore, open-loop control system is less accurate than closed-loop control system

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