System-Level Design Review

Week 5: 10/09/2009

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

Project Background Customer: Mini Baja club at RIT

Endurance race and water event

Current water propulsion system

Project Scope Project Scope:

Recommendation for the best water propulsion option

Documentation supporting this recommendation

Usable test stand

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

Project Plan

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

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

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)

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

Test Stand Design Screening

Spring

Moving Tire (two axles)Force Sensor

Moving Tire (one axle)

Strain Gauge

Moving Tank

Test Stand Design Scoring1. Ultimate Hybrid

2. Strain Gauge

3. Spring

4. Moving Tire

5. Moving Tank

Test Stand Design Selection Parameters :

Force

Wheel speed

Tire depth in water

Camber/Toe (TBD)

Design Risk Assessment

Mechanical System Diagram

Electrical System Diagram

Software System Diagram

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

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

Questions

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Customer Needs Table

Target Specs Table

QFD Analysis: HOQ

Concept Scoring Matrix

Concept Selection Table

Design Screening Matrix

Design Scoring Matrix