Download JNTUA M.Tech 1st Sem 2016 Aug Supply 9D15102 Advanced Mechanisms Question Paper

Code: 9D15102

M.Tech I Semester Supplementary Examinations August 2016

ADVANCED MECHANISMS

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(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:
   

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   Flex link (AD) = 100 mm.
   Input link (AB) = 30mm.
   Coupler (BC) = 40 mm.
   Output link (CD) = 60 mm.
   Angle DAB = 60°.

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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 (θ) degree	60	90
   Velocity (θ) rad/sec	5	2
   Acceleration rad/sec²	2	7

   
   

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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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