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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Electrical Engineering (EE) MCQ

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Electrical Engineering (EE) MCQ


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15 Questions MCQ Test - Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms below.
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Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 1
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Consider a simple mass spring friction system as given in the figure K1, K2 are spring constants f-friction, M-Mass, F-Force, x-Displacement. The transfer function X(s)/F(s) of the given system will be :

Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 1

Explanation: Force balance equations are formed where force from both the springs will be balanced by the mass system.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 2
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The output of an first order hold between two consecutive sampling instants is:

Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 2

Explanation: Inverse Laplace of the equation of first order hold gives the ramp function and hence the output of an first order hold between two consecutive sampling is ramp function.

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Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 3
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Which of the following is an example of an open loop system?

Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 3

Explanation: Execution of a program by a computer is an example of an open loop system as the feedback mechanism is not taken by the computer program and set programs are used to get the set output.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 4
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A tachometer is added to servomechanism because:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 4

Explanation: A tachometer is a device to control the speed and adjust damping and it is used in servomechanism to adjust damping and mainly is used in AC servomotors.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 5
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A synchro Transmitter is used with control transformer for:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 5

Explanation: Synchro transmitter is used as the error detector to get the desired speed and it is accompained with the synchro transformer which is used as an amplifier.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 6
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The below figure represents:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 6

Explanation: The equations of performance are
B1(dX1/dt-dX2/dt)+k1(X1-X0)=k2X0
T=k1(1+B1s/K1)/k1+k2(1+sB1/k1+k2)
X0(s)/X1(s)=1/a(1+aTs/1+Ts).

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 7
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Backlash in a stable control system may cause:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 7

Explanation: In a servo system, the gear backlash may cause sustained oscillations or chattering phenomenon and the system may even turn unstable for large backlash.

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Tachometer feedback in a D.C. position control system enhances stability?
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 8

Explanation: Tachometer feedback is derivative feedback and hence increases the stability and speed of response, so tachometer adds zero at origin.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 9
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For a tachometer, if a(t) is the rotor displacement, e(t) is the output voltage and K is the tachometer constant, then the transfer function is given by:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 9

Explanation: e(t)=Kw
E(s)=Ksa(s)
E(s)/a(s)=Ks.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 10
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Gear train in the motor is used to reduce the gear ratio?
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 10

Explanation: Gear ratio refers to the ratio of the number of teeths in the respective gears and gear train in the motor is specifically used to increase the gear ratio.

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Assertion (A): Servomotors have heavier rotors and lower R/X ratio as compared to ordinary motors of similar ratings.
Reason (R): Servomotor should have smaller electrical and mechanical time constants for faster response.
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 11

Explanation: Ac servomotors are essentially induction motor with low X/R ratio for the rotor which has very low inertia.

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Assertion (A): DC servomotors are more commonly used in armature controlled mode than field controlled mode.
Reason (R): Armature controlled Dc motors have higher starting torque than fiels controlled motors.
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 12

Explanation: To get higher speed in field controlled dc motor, field current is decreased with decrease in torque.

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In case of DC servomotor, the back emf is equivalent to an “electric friction” which tends to:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 13

Explanation: As Back emf in dc servomotors provides necessary centrifugal force to control the speed of the motor that increases the stability of the system.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 14
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The lagrangian is defined as:
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 14

Explanation: By definition lagrangian is defined as difference of kinetic and potential energy.
L=K-P.

Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 15
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A gantry robot consists of a manipulator mounted on an overhead system that allows movement only in ________ plane.
Detailed Solution for Test: Differential Equations Of Physical Systems And Dynamics Of Robotic Mechanisms - Question 15

Explanation: Gantry robot allows motion only in horizontal plane and this is made in this geometry to fulfill the respective work.

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