Week 5 Design Lab

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Week 5 Design Lab
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Review of Rocket Project

• Convergent and Divergent thinking
• Dixons Taxonomy

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Converging
Answerable Question Many Possibilities
Unique answer

• Questions with specific answers
• Optimizing
• Selecting

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Diverging
New Ideas
Posed Problem

• Generating new ideas (brainstorming)

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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.

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What kind of thinking did you do?

• How did divergent thinking apply?
• How did convergent thinking apply?

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Dixons Taxonomy
States of Knowledge
Perceived Need
Function
Physical Phenomenon
Embodiment
Artifact Type
Artifact Instance
Feasibility

• Describe your final rocket at each state of
  knowledge

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Dixons Taxonomy
States of Knowledge
Perceived Need
Function
Physical Phenomenon
Embodiment
Artifact Type
Artifact Instance
Feasibility

• Each design problem has initial state and final
  state of knowledge

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Dixons 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 last 3 weeks of the rocket project?

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Dixons 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 last 3 weeks of the rocket project?

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Dixons 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?

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Dixons 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?

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Discussion of Crane Project

• Overview
• Grading
• Necessary Tasks

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

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

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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!
  

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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.

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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.

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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.

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Engineering Tasks

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

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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
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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
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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
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What kind of thinking will you do?

• How will divergent thinking apply?
• How will convergent thinking apply?

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

• Future design problems continue to increase in
  complexity