System-Level Design Review Week 5:...
Transcript of System-Level Design Review Week 5:...
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System-Level Design Review
Week 5: 10/09/2009
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Agenda1. Project Background2. Project Scope and Objective3. Project Schedule4. Customer Requirements5. Engineering Specifications6. QFD Analysis7. Concept Generation, Scoring, and Selection8. Design Generation, Scoring, Selection9. Risk Assessment10. Budget11. Next Steps
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Project Background Customer: Mini Baja club at RIT
Endurance race and water event
Current water propulsion system
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Project Scope Project Scope:
Recommendation for the best water propulsion option
Documentation supporting this recommendation
Usable test stand
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Project Objective MSD I:
Objectives
Test stand concept generation and selection
Test stand design generation and selection
Test stand design verification
Materials acquisition
Deliverables
Final test stand design
Proof of concept for test stand design
MSD II:
Objectives
Troubleshoot design
Test stand build
Fender design and build
Determine testing procedure
Test multiple tires
Select best tire
Deliverables
Usable test stand
SOP for operating test stand
Documentation supporting best tire recommendation
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Project Plan
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Critical Project Dates Planning -------------------------------------------- Oct. 2 Concept Development ---------------------------- Sept. 25 System-Level Design ------------------------------ Oct. 9 Detailed Design
Determine final specs ---------------------------- Oct. 23 Perform CFD ---------------------------------------Oct. 23 Determine materials ------------------------------ Oct. 23 Calculate final budget ---------------------------- Oct. 30 Order parts -----------------------------------------Oct. 30
Concept Build Build test stand Program sensors Address safety risks Write SOP
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Customer Requirements Provide documentation to clearly communicate all project
work done Provide test stand that can produce repeatable tire/fender
performance data Provide test stand Standard Operating Procedure (SOP) Provide test stand that is capable of withstanding annual
temperature ranges Provide durable test stand Provide safe test stand Provide test stand that can produce accurate tire/fender
performance data Provide maneuverable test stand
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Engineering Specifications Temperature range test stand can withstand (°F)
Wheel speed (RPM)
Tire depth in water (in)
Forward thrust (lbf)
Test stand mass (lbf)
Overall test stand dimensions (in)
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House of Quality Results
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Concept Scoring and Selection1. Build test stand
2. Build scale model
3. Test designs on car
4. Send tires to tire company for testing
5. Use RIT facility to test
6. Perform testing simulation
7. Rent equipment
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Test Stand Design Screening
Spring
Moving Tire (two axles)Force Sensor
Moving Tire (one axle)
Strain Gauge
Moving Tank
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Test Stand Design Scoring1. Ultimate Hybrid
2. Strain Gauge
3. Spring
4. Moving Tire
5. Moving Tank
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Test Stand Design Selection Parameters :
Force
Wheel speed
Tire depth in water
Camber/Toe (TBD)
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Design Risk Assessment
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Mechanical System Diagram
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Electrical System Diagram
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Software System Diagram
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BudgetItem Min Target Max
Raw Materials
- Tank 250 300 500
- Caster Wheels 50 80 150
- Gears & Belts 100 150 200
- Fenders 200 300 300
Electronics
- DC Motor 100 300 600
- Microcontroller 50 100 300
- Optical Encoder 50 60 80
- Load Cell 150 200 400
- Accessories 10 15 20
Provided by Baja
- Wheels for testing - - -
- Wheel mounting - - -
Total $960 $1505 $2550
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Next Steps Determine final specs ------------------------ Oct. 23
Perform CFD ---------------------------------- Oct. 23
Determine materials ------------------------- Oct. 23
Calculate final budget ------------------------ Oct. 30
Order parts ------------------------------------ Oct. 30
Begin test stand build ------------------------ Nov. 13
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Questions
?
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Customer Needs Table
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Target Specs Table
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QFD Analysis: HOQ
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Concept Scoring Matrix
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Concept Selection Table
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Design Screening Matrix
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Design Scoring Matrix