1. Learning with Purpose March 22, 2013 Learning with Purpose March 22, 2013 22.322 Mechanical Design II Spring 2013

2. Learning with Purpose March 22, 2013 HW #4 Problem 11.3a

3. Learning with Purpose March 22, 2013 HW #4 Problem 11.12

4. Learning with Purpose March 22, 2013 In the previous lecture, we discussed static and dynamic balancing of rotating parts Main difference between static and dynamic balancing?? Specifically, we looked at a few examples of shafts with disks We were asked to balance the shaft by adding masses to one or more of the disks Lets look at similar, but different examples… Lecture 19

5. Learning with Purpose March 22, 2013 Lets consider the unbalanced link shown below. We would like to balance the ink with a single mass, m b. In order to do this, we need to essentially make the center of mass of m 1, m 2, and m b be located at x=0, y=0. Lecture 19

6. Learning with Purpose March 22, 2013 Lecture 19

7. Learning with Purpose March 22, 2013 Lecture 19

8. Learning with Purpose March 22, 2013 Lecture 19 Example

9. Learning with Purpose March 22, 2013 Lets consider the two-plane dynamic balancing problem Lecture 19

10. Learning with Purpose March 22, 2013 Lecture 19

11. Learning with Purpose March 22, 2013 Lecture 19

12. Learning with Purpose March 22, 2013 Lecture 19