week 5 design lab. review of rocket project convergent and divergent thinking dixon’s taxonomy
TRANSCRIPT
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Week 5 Design Lab
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Review of Rocket Project
• Convergent and Divergent thinking
• Dixon’s Taxonomy
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Converging
• Questions with specific answers
• Optimizing
• Selecting
Unique answer
Answerable QuestionMany Possibilities
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Diverging
• Generating new ideas (brainstorming)
New IdeasPosed Problem
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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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Dixon’s Taxonomy
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
• Describe your final rocket at each state of knowledge
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Dixon’s Taxonomy
• Each design problem has initial state and final state of knowledge
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
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Dixon’s Taxonomy
• What were the initial and final design states for the last 3 weeks of the rocket project?
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
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Dixon’s Taxonomy
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
• What were the initial and final design states for the last 3 weeks of the rocket project?
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Dixon’s Taxonomy
• What were the initial and final design states for the first week of the rocket project?
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
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Dixon’s Taxonomy
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
• 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
I-beam pinned
Weights- 70 pounds each
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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 should be considered part of the base unit. Do not remove!
These are a redundant safety feature.
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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
C
WePerformanc
• 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?
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
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What kind of project is this?
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge
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Dixon’s Taxonomy
• Future design problems continue to increase in complexity
Perceived NeedFunctionPhysical PhenomenonEmbodimentArtifact Type
Artifact Instance
Feasibility
States of Knowledge