Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem Old 181702 Motion Control Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE SEMESTER?VIII(OLD) ? EXAMINATION ? WINTER 2017
Subject Code: 181702 Date: 02-11-2017
Subject Name: Motion Control
Time: 02:30 pm to 05:00 pm Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain resolvers and magnetic pickups as a encoder. 07
(b) List out selection criteria for dc motor for incremental motion applications. 07
Q.2 (a) Explain permanent magnet moving coil dc motor. 07
(b) Explain the techniques for minimizing torsional resonance effect in detail. 07
OR
(b) List out all methods of speed control of dc motor and explain any one in detail. 07
Q.3 (a) Write a short note on unidirectional servo amplifier. 07
(b) Explain bipolar PWM amplifiers. 07
OR
Q.3 (a) Draw and explain velocity control system with block diagram. 07
(b) Write short not on phase locked servo system. 07
Q.4 (a) Describe the hybrid type step motor with relevant waveform/diagram. 07
(b) List out the selection criteria for stepper motor. Explain step angle resolution and
torque requirements.
07
OR
Q.4 (a) What are the advantages and disadvantages of step motors? Explain the step
motor performance characteristics in detail.
07
(b) Explain any two application of step motor. 07
Q.5 (a) Explain any one suppression circuit for DC motor control with diagram. 07
(b) Explain effect of lead angle in closed loop control of step motor. 07
OR
Q.5 (a) Draw and explain bidirectional four-phase single and two phase on logic
sequencer circuit with waveform of output phase for each pulses.
07
(b) Why over drive circuits are required for step motors? Explain dual voltage
control circuit.
07
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This post was last modified on 20 February 2020