Download JNTUA M.Tech 2nd Sem Supply 2016 Aug 9D15102 Advanced Mechanisms Question Paper

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Code: 9D15102

M.Tech I Semester Supplementary Examinations August 2016
ADVANCED MECHANISMS
(Machine Design)
(For students admitted in 2012, 2013, 2014 & 2015 only)

Time: 3 hours Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks
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1 (a) Derive the Kutzbach mobility equation for spatial mechanism.
(b) Prove that the rocker of a Groshoff linkage can never cross the line of frame.

2 What do you mean by inflection circle and explain the Hartmann?s method of determining the
inflection circle.

3 Determine the polode curvatures for the coupler link of a four bar mechanism with the following
dimensions:
Flex link (AD) = 100 mm.
Input link (AB) = 30mm.
Coupler (BC) = 40 mm.
Output link (CD) = 60 mm.
Angle DAB = 60
0
.

4 Explain the synthesis of a crank-rocker mechanism for a given degree of quick return action i.e.
for the prescribed value of crank angle and rocker angle.

5 (a) Write notes on Horne?s and Nelson?s Motion Atlas? related to path generation.
(b) Explain the relative rotocenter method (two positions) for the synthesis of four bar function
generator.

6 Synthesize a four-bar linkage to meet the following specifications of position, velocity and
acceleration:
Input link Output link
Position ( ?) degree 60 90
Velocity ( ?) rad/sec 5 2
Acceleration rad/sec
2
2 7
Assume minimum length of the link = 100 mm.

7 (a) Explain the D-H parameters of a spherical arm.
(b) Sketch and explain PUMA industrial robot manipulator.

8 (a) Explain the Jacobian of the two-link revolute joined arm.
(b) Obtain the singularity of a two-link planar arm.

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