DRAFT
Take Home Final - ME185b, Spring 1999
Use material from your design notebook and log for final.
1. Design For Disassembly (5%)
Disassemble and return the following items: (large envelopes will be provided in the lab)
2 large motors, 2 medium motors, 2 pistons, & electrical connector. (and other reusable parts)
2. Contest Performance (5%)
Describe how your machine worked during the contest. What aspects worked as intended, what did not. Use sketches as necessary.
2. Analysis (30%)
Select a major moving component of your machine that include an energy source (motor, piston, or springs). Analyze the performance of this component using techniques covered in the course:
a. Describe and sketch the component. Discuss how well it performed, how the design developed over time, and what aspects where important in its performance.
b. Measure the performance of the device. You may want to use spring scales, or a timer to measure speed.
c. Perform a static analysis, and if necessary a dynamic analysis of the device. Use the results of your measurements to identify values used in the analysis. If necessary make estimation and assumptions, with explanations. Did the loading effect how you designed the component.
d. How many degrees of freedom does it have? Is the mechanical advantage constant or variable. Did you intentionally select this mechanical advantage, and if so how?
3. Detail Design (20%)
a. Draw two components of your machine such as a bearing or bracket. Include top, side, front, and an isometric view.
b. Show on the drawings and explain where precision was important in the part, what that level of precision was.
c. Explain how the part was fabricated, and what decisions were made to ease fabrication.
d. Perform a static analysis of the components, showing a free body diagram and all the forces on the device. Estimate forces where necessary, while describing how you came up with the estimates, and any assumptions you used.
e. Comment on how well the components performed their objective.
4. Creativity (20%)
a. Describe some of your conceptual breakthroughs (at least 2). Can you identify the "spark" that lead to these breakthroughs?
b. Describe some of your conceptual blocks (at least 2), where you did not "see" a solution for some time. Can you identify what might have caused or contributed to these blocks?
5. Project Management (20%)
a. Describe instances (at least 2) where you used project management techniques effectively. For example these might include specifying an order in which you build or test a device, a risk reduction strategy, or an early verification test.
b. In retrospect, how could you have managed the project better? Describe at least 2 aspects where project management could have been improved. For example: did you prioritize your efforts effectively? was your initial estimate correct of what was high risk in your design? are there early verification test or simple analysis that would have helped?
6. Increase In Effectiveness (5% extra credit) Did you notice areas of the design process where you increased your effectiveness during the course? If so describe.