Exam1dsol.fall10

Exam1dsol.fall10 - ME 560 Kinematics. Class Test 1 Friday,...

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ME 560 Kinematics. Class Test 1 Fall Semester 2010 Friday, September 10th Name of Student : ________________________________ OPEN BOOK AND OPEN NOTES Problem 1 (20 points). For Problems 1.8 and 1.12, see pages 42 and 43, determine: (i) the number of lower pairs and the number of higher pairs; and (ii) the mobility of each mechanism using the Kutzbach mobility criterion. Does this criterion provide the correct answers for each mechanism? Briefly explain why or why not. Problem 2 (30 points). Consider the inverted slider-crank mechanism shown in Example 3.3, see Figure 3.11(a), page 114, and repeated below as Figure 1. The specified dimensions are 2 O A 3 inches, = 4 OC AB 2inche s == and 24 OO 1 4 i n c h e s . = In this position, the input angle o 22 4 AO O 30 θ=∠ = , and the angle between link 3 (i.e., AB) and link 4 (i.e., the line CF in link 4) is a right angle. The distance from point C to point F is 16 inches. (i) Determine the mobility of the mechanism using the Kutzbach mobility criterion. Does this criterion provide the correct answer for this mechanism? Briefly explain why or why not. (ii) Determine the distance from point C to pin B and the angle between link 4 (i.e., the line 4 OC) and the X-axis. (iii) Determine the X and Y coordinates of point F. (iv) Draw the vectors on Figure 1 that are necessary for a kinematic analysis of the mechanism. Label and show the direction of each vector. (v) Write the vector loop equation(s) and identify a suitable input (or inputs) for the mechanism. List the known quantities, the unknown variables, and any constraints. If you identify constraint(s) then write the constraint equation(s).
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Exam1dsol.fall10 - ME 560 Kinematics. Class Test 1 Friday,...

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