Question

QI: Choose the appropriate answer A, B, C, or D (25 point) 1- In the open loop transfer function, what is the relationship between input and output signals? (A) Output does not depend on the input (C) Input depends on the Output 2-The suitable test signal for the system that is subjected to shock inputs is ------. (A) Ramp function (B) Step function (C) Impulse function (D) None of above 3-The error signal is equal to the difference between (A) Desired and feedback (B)Output and feedback (C)Desired and disturbance (D)None of (B) Input does not depend on the Output (D) none of above signals. above 4- If a sensor can measure the position of an object on power-up relative to a reference (the distance of the object from a reference point on power-up), it is called- (A) Incremental sensor (B) Absolute sensor (C) Velocity sensor (D) None of above 5- The key to ---- operating principle is that the change in the position of the rotor element changes the electromagnetic coupling (magnetic flux linkage) between the two windings. (A) syncro sensors (C) linear variable differential transformer (LVDT) sensor (D) temperature sensor (B) pressure sensor

Answer 1

Solution:

_________________________________________________________________

Question 1: In the open-loop transfer function, what is the relationship between input and output signals?

(A) Output does not depend on the input

(B) Input does not depend on the Output

(C) Input depends on the Output  

(D) None of above signals.

Answer: (B) Input does not depend on the Output

Explanation: The open-loop transfer function is defined as the ratio of the output of the feedback path, B(s) to the actuating signal, E(s). Hence the Input does not depend on the Output.

Open Loop Transfer Function (OLTF) = B(s) / E(s) = G(s).H(s).

_________________________________________________________________

Question 2: The suitable test signal for the system that is subjected to shock inputs is ___________

(A) Ramp function

(B) Step function

(C) Impulse function

(D) None of the above

Answer: (C) Impulse function

Explanation: Impulse function in the control system replicates sudden shock quality of the actual input signal. Impulse response gives importance to change in the system in reference to some external alteration.

• The step function defines the sudden change in properties of the actual signal.
• The ramp signal defines the constant velocity feature of the actual input signal.

_________________________________________________________________

Question 3: The error signal is equal to the difference between

(A) Desired and feedback

(B) Output and feedback

(C) Desired and disturbance

(D) None of the above

Answer: (D) None of the above

Explanation: Error signal is the difference between the input and the feedback (which may be the output signal itself or a function of the output signal)

_________________________________________________________________

Question 4: If a sensor can measure the position of an object on power-up relative to a reference (the distance of the object from a reference point on power-up), it is called ___________

(A) Incremental sensor

(B) Absolute sensor

(C) Velocity sensor

(D) None of the above

Answer: (A) Incremental sensor

Explanation: An incremental sensor can measure the position of an object on power-up relative to a reference.

• Absolute sensor can measure the position based on you zero point.
• Velocity sensor is sensor that responds to velocity rather than the position

_________________________________________________________________

Question 5: The key to ______ operating principle is that the change in the position of the rotor element changes the electromagnetic coupling (magnetic flux linkage) between the two windings.

(A) Syncro sensors

(B) Pressure sensor

(C) Linear variable differential transformer (LVDT) sensor

(D) Temperature sensor

Answer: (A) Incremental sensor and (C) Linear variable differential transformer (LVDT)

Explanation: The Linear variable differential transformer (LVDT, Resolver, and Syncro are sensors which operate based on the transformer principle of electromagnetism. The operating principle is that the change in the position of the rotor element changes the electromagnetic coupling between the primary and secondary windings

Reference: Textbook-‘Mechatronics with Experiments’ by Sabri Centinkunt

_________________________________________________________________