Download JNTUA M.Tech 2nd Sem Supply 2018 Feb 9D15102 Advanced Mechanisms Question Paper

Firstranker's choice

www.FirstRanker.com

Code: 9D15102

--- Content provided by FirstRanker.com ---

www.FirstRanker.com

M.Tech II Semester Supplementary Examinations February 2018

ADVANCED MECHANISMS

(Production Engineering & Engineering Design)

(For students admitted in 2013, 2014, 2015 & 2016 only)

--- Content provided by FirstRanker.com ---

Time: 3 hours

Max. Marks: 60

Answer any FIVE questions

All questions carry equal marks

*****

--- Content provided by FirstRanker.com ---

1. (a) Determine the mobility of linkage shown in figure below.
   
   S - Spherical
   R - Revolute
   C - Cylindrical
   

   --- Content provided by FirstRanker.com ---

   (b) Define mobility of a device. Discuss the applications of Kutzbach mobility criterion.
2. (a) Explain virtual work and principle of virtual work.
   (b) Explain with neat sketch about: (i) Hall's equation. (ii) Hartmann's construction.
3. (a) Explain guiding a body through a number of prescribed points.
   (b) Sketch and explain polode curvature in four bar mechanism.

--- Content provided by FirstRanker.com ---

4. (a) What are the types of four bar mechanism? Explain them with neat sketch.
   (b) A four bar linkage is required to generate a function y = x^1.6 for 1 ≤ x ≤ 3. The input link rotates from 60° to 120° and follower link rotates from 60° to 150°. Using 3 accuracy points of Chebychev. Find θ₁, θ₂, θ₃ and φ₁, φ₂, φ₃ where θ₁ is input angle φ₁ is the output angle corresponding to its accuracy point.
5. (a) Explain in brief about: (i) Guiding a body though, two distinct positions. (ii) Guiding a body though three distinct positions.
   (b) Synthesize a four bar linkage to generate y=log₁₀x, where x varies between 10 and 40. Use 3 precision points with Chebyshev spacing input starting angle Ψ₁ = 45° and ΔΨ = 60°, Δφ = 90°. Fixed link length 100 mm. Plot the mechanism.
6. Synthesize a four bar linkage to give the following values for the angular velocities and accelerations: ω₂ = 130 rad/s; ω₃ = 200 rad/s, ω₄ = 85 rad/s
   

   --- Content provided by FirstRanker.com ---

   a₂ = 0 rad/s, a₃ = −1200 rad/s²; a₄ = -10000 rad/s²
   
7. Discuss important kinematic analysis of following:
   (a) D-H transformation matrix.
   (b) PUMA & STANFORD ARM.

--- Content provided by FirstRanker.com ---

8. Explain:
   (a) Mobility criterion for planar mechanisms.
   (b) Mobility criterion for spatial mechanisms and manipulators.

www.FirstRanker.com

--- Content provided by FirstRanker.com ---