Week 5 Design Lab

1. Week 5 Design Lab

2. Review of Rocket Project • Convergent and Divergent thinking • Dixon’s Taxonomy

3. Converging • Questions with specific answers • Optimizing • Selecting Answerable Question Many Possibilities Unique answer

4. Diverging • Generating new ideas (brainstorming) Posed Problem New Ideas

5. Effective Design • Good design teams go through multiple diverge-converge cycles • Are effective at transitioning • You must be aware of which process you are in.

6. What kind of thinking did you do? How did divergent thinking apply? How did convergent thinking apply?

7. Dixon’s Taxonomy States of Knowledge • Describe your final rocket at each state of knowledge Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

8. Dixon’s Taxonomy States of Knowledge • Each design problem has initial state and final state of knowledge Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

9. Dixon’s Taxonomy States of Knowledge • What were the initial and final design states for the last 3 weeks of the rocket project? Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

10. Dixon’s Taxonomy States of Knowledge • What were the initial and final design states for the last 3 weeks of the rocket project? Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

11. Dixon’s Taxonomy States of Knowledge • What were the initial and final design states for the first week of the rocket project? Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

12. Dixon’s Taxonomy States of Knowledge Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility • What were the initial and final design states for the first week of the rocket project?

13. Discussion of Crane Project • Overview • Grading • Necessary Tasks

14. Crane Base Unit Two identical base units, one currently located in project lab. 3 HP motor Weights- 70 pounds each I-beam pinned

15. Crane Base Unit 48 inches

16. Crane Base Unit

17. Crane Base Unit

18. Project: Design a truss • One pulley must be centered above weights at least 36” above the floor. • Must lift and return the weights to original starting location

20. Crane Base Unit: Safety Features These are a redundant safety feature. These should be considered part of the base unit. Do not remove!

21. Final “Lift Off” • Last Lab Period of semester- Monday Dec. 10, Thursday Dec. 13 • Two base units operating simultaneously • ~20 minutes per team, you must be well prepared! • Three test lifts per team • First lift = 70 pounds • Second lift = your choice • Third lift = your choice- max of 1400 lbs.

23. Performance Equation • W = Best weight successfully lifted • C = Cost of materials for crane C refers to all materials your team takes, whether you end up using it in your crane or not!

24. Cost and Availability of Materials • Aluminum is $3 per kilogram. • Price of plastic is $0.80 per kilogram. • Density of each is provided in handout. • Plastic and aluminum bar stock available in ¼” thickness, various widths. • Max 75 cu. in. of each material. • Four free “transactions” per team.

25. Grading • 20% of course grade is based on performance • 20% of course grade is based on final report • To earn a passing grade on performance crane must lift 70 lbs.

26. Grading • 20% of course grade is based on performance • 20% of course grade is based on final report • To earn a passing grade on performance crane must lift 70 lbs. • Lifting the minimum weight with the maximum material will earn a D.

27. Engineering Tasks • Truss Design • Compute Forces • Failure Analysis • Optimization • Fabrication • Materials Testing- Plastic • Select 2 Tests • Conduct Tests • Interpret Results

28. Engineering Tasks • Truss Design • Compute Forces • Failure Analysis • Optimization • Fabrication • Materials Testing- Plastic • Select 2 Tests • Conduct Tests • Interpret Results CEE and ME are taking statics now, ECE will take in spring

29. Engineering Tasks • Truss Design • Compute Forces • Failure Analysis • Optimization • Fabrication • Materials Testing- Plastic • Select 2 Tests • Conduct Tests • Interpret Results ChE, CEE and ME students all take one or more courses on materials science

30. Engineering Tasks • Truss Design • Compute Forces • Failure Analysis • Optimization • Fabrication • Materials Testing- Plastic • Select 2 Tests • Conduct Tests • Interpret Results Rigorous optimization requires programming skills- MATLAB will be used for this project

31. What kind of thinking will you do? How will divergent thinking apply? How will convergent thinking apply?

32. What kind of project is this? States of Knowledge Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

33. What kind of project is this? States of Knowledge Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility

34. Dixon’s Taxonomy States of Knowledge • Future design problems continue to increase in complexity Perceived Need Function Physical Phenomenon Embodiment Artifact Type Artifact Instance Feasibility