Team Silver 2.009 Final Presentation December 7, 2009designed.mit.edu/gallery/data/2009/final/slides/silver.pdf · 2009. 12. 9. · 2.009 Final Presentation December 7, 2009. Driven

Team Silver2.009 Final Presentation

December 7, 2009

Driven car without removing all ice?Time to clear ice

Data collected through online survey of 400 drivers over 18

Introduction

73% Yes

27% No42%

<5 min49%

5-10 min

9%

Motivation

10-20 min

User Need Performance Goals Technical Challenge

EfficientClear windshield in less than 5 min Effective ice chipping

mechanismEfficient

Minimal applied force at grips

Effective ice chipping mechanism

ComfortableHandle diameter and length

Ergonomics and compact design

Comfortable Reach distance over 2 feetErgonomics and compact design

ComfortableLightweight (less than 5 lbs)

Ergonomics and compact design

DurableFunctional in cold weather Electronics and

frictionDurable

Minimal component wear

Electronics and friction

Introduction

Design Targets

Proof of ConceptSlow Motion VideoBlade in Action

Proof of ConceptSlow Motion VideoBlade in Action

Technical

Eccentric Drive

motor

Technical

Eccentric Drive

motor

miter gears

Technical

Eccentric Drive

motor

miter gears

eccentric cam

Technical

Eccentric Drive

motoraxial

follower

blade

.045” throw

miter gears

eccentric cam

positivereturn

Technical

Eccentric Drive

In ActionActuation Simulation

Technical

In ActionActuation Simulation

Technical

Lithium NanoPhosphate Chemistry

Excellent cold weather performance

High energy density: 20 minutes of use

Safe, eco-friendly

Lightweight

Tradeoff: cost

Technical

26650 A123

LiFePO4

Cell

Batteries

26650 A123

LiFePO4

Cell

Powering IceTek

Lithium NanoPhosphate Chemistry

Excellent cold weather performance

High energy density: 20 minutes of use

Safe, eco-friendly

Lightweight

Tradeoff: cost

12-14V ChargeSignal

ChargingCircuitCar Jack

Technical

26650 A123

LiFePO4

Cell

Batteries

26650 A123

LiFePO4

Cell

Powering IceTek

Technical

Form Development

Anthropometric databaseNASA

Technical

Form Development

Anthropometric databaseNASA

Technical

Form Development

Hand tool ergonomicsCanadian Centre for Occupational Health and Safety

Anthropometric databaseNASA

Technical

Form Development

Hand tool ergonomicsCanadian Centre for Occupational Health and Safety

User testingFoam models & Popular scrapers on the market

User-Defined Needs Implementation

High end aesthetic Sleek contours

Freedom of grip Integrated smooth profile

Increased reach 2.5 feet from blade to end grip

Grip sized for all user groups Handle diameter is 1.25 in

Straight forward user interface Toggle button switch

Technical

Ergonomic User Needs

Ice Scoring Head

Brass Blade

Technical

Blade

Final Design

Powertoolmarket:$10.3billion

Snow&icetoolmarket:$70million

14milliontoolssoldannually

Ourmarket:1,000,000customers

Business

Market Data

Annual Sales

0!

20000!

40000!

60000!

80000!

100000!

120000!

1! 2! 3! 4! 5!

Uni

ts S

old

per Y

ear

YearsBusiness

Price & Costs

0!

20!

40!

60!

80!

100!

120!

140!

160!

180!

1! 2! 3! 4! 5!

Years

Dol

lars

per

Uni

t

Selling Price

Manufacturing Cost

Business

$165

$55

The Bottom Line

Sales Price: $165

NPV: $1.3 million

Investment: $350,000

ROI: 80%

Business

IceTek: The Next Generation

Reduce the size of gearbox (form factor)

Revise design based on mass production

Establish easier assembly methods

Business

Acknowledgements

Prof. David WallaceProf. Maria YangBarry KudrowitzLoren WoodJane KokernakGeoff TsaiDavid MeekerDr. Barbara HugheyJingying ZhangJustine Sheffield, AutoZoneBrett Windsor, Hopkins Mfg Corporation

Justin Coutu, R&D TechnologiesDick FennerJoe CroninSteve HaberekJim DudleyBob NuttalFred Cote400 User Survey Respondents

Back up

Power Decisions

Cord Always Ready Long Life Prohibitively Unwieldy

Cordless Charging Required Limited Battery Life Maneuverable

Charging

Built in Car Charger Circuit Charging Procedure:

Phase I -Constant Current

Phase II -Constant Voltage

Voltage

Current

2 A

7.4 V

Charging

Charging