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

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Code: 9D15102

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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

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Answer any FIVE questions

All questions carry equal marks

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.

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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.

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Angle DAB = 60°.

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-barlinkage to meet the following specifications of position, velocity and acceleration:

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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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