Elements of control system & their definitions - Manufacturing Processes - 1

Q.  Match the following elements of control system in Group 1 with their definitions in Group 2.

1. Control variable --------------------------------- A. A standard signal used for comparison in the closed-loop system
2. Command ---------------------------------------- B. The quantity of controlled system which can be directly measured
3. Reference input --------------------------------- C. Any signal other than reference
4. Disturbance -------------------------------------- D. The input which can be independently varied
- Published on 03 Aug 15

a. 1-(A), 2-(B), 3-(C), 4-(D)
b. 1-(B), 2-(C), 3-(A), 4-(D)
c. 1-(B), 2-(D), 3-(A), 4-(C)
d. 1-(B), 2-(A), 3-(D), 4-(C)

ANSWER: 1-(B), 2-(D), 3-(A), 4-(C)

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    Discussion

  • Pankaj   -Posted on 19 Oct 15
    - When some physical components are arranged to form a system with connection or relation among them in such a way that these components can command, direct or regulate the system or another, then the arrangement is called as control system.

    - Some elements of control system and their definitions are as follows

    1. Controlled variable: It is a quantity or condition of the controlled system which can be directly measured and controlled.

    2. Command: It is an input that can be independently varied.

    3. Reference input: It is a standard signal that is used for comparison in the closed-loop system.

    4. Disturbance: Disturbance can be any signal apart from the reference which affects the system performance.

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