Concept Design Review

Micro Air VehicleProject: P07121

02.09.07

Sponsored byImpact TechnologiesThe Boeing Company

Mark BaybuttElectrical Engineering

David BlonskiIndustrial Engineering

Team Leader

Andrea WyantElectrical Engineering

Geoff AmeyComputer Engineering

Perry YoungMechanical Engineering

Daniel SegarMechanical Engineering

Patrick O’NeilMechanical Engineering

Timothy NowickiMechanical Engineering

Benjamin MetzMechanical Engineering

Jeffrey KozakCustomer / Guide

Mechanical Engineering

Project ManagementSystems Integration

David Blonski

MaterialsManufacturingBenjamin Metz

PropulsionAndrea WyantPerry Young

Electrical ComponentryMark Baybutt

CameraMisc. Electrical

Geoff Amey

AerodynamicsDan Segar

MiscellaneousTim Nowicki

Patrick O’Neil

Team Breakdown

Customer Requirements

• Able to fly 1200m (linearly)

• Able to take two “legible” pictures

• Wireless remote control

• Stay within budget

• Ability to launch

• Able to be flown accurately

• Must be durable

• Must provide hard copy of photos

• Onboard power supply

Metric Importance9

Improve flight capabilitiesIncrease lift Lift Coefficient 9Improve aerodynamics Drag (N) 3Increase stability Roll Moment Coefficient 3

Improve power efficiencyIncrease thrust Thrust (g) 9Optimize power consumption System Power (W) 1

Decrease weight Weight (g) 3Decrease max linear dimension Length (cm) 1Increase camera capabilities Resolution (lines), RF Power (mW) 1

NeedRebuild last year's MAV

Customer Needs

Engineering Specifications

Metric Target

Lift Coefficient > 0.49

Drag (N) < 0.076

Roll Moment Coefficient TBD*

Thrust to Weight > 1:1

System Power (W) < 80

Weight (g) < 96

Length (cm) < 25.4

Resolution (lines) > 300

RF Power (mW) 80

Engineering Specifications

3Key 9 00 = Not Correlated 3 0 91 = Slight Correlation 1 0 13 = Some Correlation 0 3 0 39 = Not Correlated 9 9 0 3 0

3 3 3 3 0 30 0 0 0 1 0 0

Voice of the Customer

Customer Requirements

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Th

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RF

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Able to fly 1200 meters (linear) 9 1 0 9 9 1 3 9 9 0Able to take 2 "legible" pictures 9 0 0 0 0 3 0 0 0 9Wireless remote control 9 0 0 3 0 1 0 0 0 0Stay within budget 3 1 0 1 0 1 0 0 0 1

Key Ability to launch 9 3 3 9 9 0 0 9 0 00 = Not Important Able to be flown accurately 3 1 3 3 3 0 3 3 9 01 = Slightly Important Must be durable 3 3 3 0 0 0 0 0 0 03 = Important Must provide hard copy of photos 9 1 1 0 0 3 0 0 0 39 = Very Important Onboard power supply 9 9 3 9 0 0 0 3 0 0

Raw Score 141 81 282 171 75 36 198 108 111Relative Weight 0.12 0.07 0.23 0.14 0.06 0.03 0.16 0.09 0.09Ranking 4 7 1 3 8 9 2 5 5

Weight (g)Dimensions (cm)System Power (W)Thrust (N)

Resolution (lines)Engineering Metrics

RF Power (mW)Drag (N)Lift CoefficientRoll Moment Coefficient

QFD Analysis Part 1

QFD Analysis Part 2

Engineering Metrics MA

V S

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stem

s

Pha

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Rel

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ts

Gro

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Con

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Cam

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Pro

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ion

Sys

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Pla

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0.12 0 1 9 9Key 0.07 0 0 3 90 = No contribution 0.23 0 3 9 01 = Slight contribution 0.14 0 0 9 03 = Notable Contribution 0.06 9 3 1 09 = Significant contribution 0.03 0 1 3 9

0.16 0 0 1 90.09 0 0 1 90.09 0 9 0 0

0.54 1.83 5.02 4.230.05 0.16 0.43 0.36

Weight (g)Dimensions (cm)System Power (W)Thrust (N)

Resolution (lines)Raw Score

Relative Weight

RF Power (mW)Drag (N)Lift CoefficientRoll Moment Coefficient

Morphological Analysis

1 2 3 4 5 6 7 8 9

Gro

un

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Co

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Pro

pu

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n

Sy

ste

mC

am

era

Pla

tfo

rm

Stronger Antennae

New Controller

New Servos

Decrease# of Servos

New Receivers

Angle of Attack

IncreaseMotorRPM

DecreasePropellerSize

FewerBatteries

StandardBody

TimingSystem

Smaller

MorphableWing

Pod Smaller Scalability WingletsSmallerTail Thermoset

Pugh Analysis Part 1

Stronger Antennae

New Controller

New ServosFewer Servos

New Receivers

Increase Motor RPM

Decrease Propeller

Size

Fewer Batteries

Increase lift 9 0 0 0 1 0 1 -3 1Improve

aerodynamics3

0 0 0 0 0 0 0 0Increase stability 3 0 1 0 -1 0 -1 3 0Optimize thrust to

weight9

0 0 0 0 0 3 3 0Decrease power

consumption1

0 0 1 1 1 -3 0 0Decrease weight 3 0 0 1 1 3 0 1 3

Decrease max linear dimension

10 0 0 0 1 0 0 0

Increase camera capabilities

10 0 0 0 0 0 0 0

Improve Durability 10 0 0 0 0 0 0 0

Feasibliity 9-1 -3 -1 -3 3 3 3 1

Raw Score -0.45 -1.2 -2.15 -7.31 16.34 24.51 16.77 11.61

Weight

Ground Control0.05

Propulsion System0.43

Key-3 = Strong negative contribution-1 = Negative contribution0 = No contribution1 = Positive Contribution3 = Strong Positive Relationship

Pugh Analysis Part 2

SmallerTiming System

Morphable Wing

PodSmaller

Max Dimension

Winglets Smaller Tail ThermosetStandardize

BodyScalability

Angle of Attack

Increase lift 9 1 0 0 0 0 1 0 0 0 0 3Improve

aerodynamics3

1 0 1 3 0 -1 3 0 1 0 -1Increase stability 3 0 0 3 3 -3 1 -1 0 1 0 1Optimize thrust to

weight9

0 0 0 0 0 0 0 0 0 0 0Decrease power

consumption1

0 9 0 0 1 0 0 0 0 0 0Decrease weight 3 3 0 3 3 3 -1 3 0 0 3 0

Decrease max linear dimension

10 0 0 0 3 0 0 0 0 3 0

Increase camera capabilities

10 0 0 0 0 0 0 0 0 0 0

Improve Durability 10 0 0 0 0 0 0 3 0 0 0

Feasibliity 9 -3 -3 0 1 -1 0 3 -3 1 -1 3Raw Score -0.96 -2.88 7.56 12.96 -1.8 2.16 15.12 -9.72 5.4 1.08 19.44

Camera0.16

Platform0.36

Weight

Ranking

Concept Score RankingIncrease Motor

RPM24.51 1

Angle of Attack 19.44 2

Decrease propeller size

16.77 3

New Receivers 16.34 4

Smaller Tail 15.12 5

Priority 1Concept Score RankingWinglets 2.16 10

Scalability 1.08 11

Priority 3

Concept Score RankingStronger Antennae

-0.45 12

Smaller Camera

-0.96 13

New Controller -1.2 14

Smaller Max Dimension

-1.8 15

New Servos -2.15 16

Timing System -2.88 17

Fewer Servsos -7.31 18

Thermoset -9.72 19

Infeasible / Impractical

Concept Score RankingPod 12.96 6

Improved batteries

11.61 7

Morphable Wing

7.56 8

Standardize body

5.4 9

Priority 2

Old MAV

New MAV

Feigao Motor

3”x2” Prop

Smaller Tail

Tear-drop Pod

10o Angle of Attack

Berg 4L Receiver

2S 730mAh Battery

Reoptimized Airfoil Twill-WeaveCarbon Composites

Theoretical Motor Analysis

Name Weight Dimensions Kv Max

I Te Tprop

Pprop (11V)

Pprop (7V)

g mm RPM/V A Nm Nm W W

Firefly 10 10 x 25 4333 1 0.0022 0.0015 7.55 5.032

Medusa Afterburner 15 12 x 30 5300 7 0.0126 0.0086 52.84 35.22

Feigao Brushless 17 12 x 30 5866 5 0.0081 0.0055 37.74 25.16

Empirical Motor Analysis

Battery Propeller Dimensions Thrust/G @ 1A (g) Thrust/G @ 2 A (g) Thrust/G @ 3A (g) Thrust/G @ 4A (g) Thrust/G @ 5A (g)

11.5 V 480 mAh

2.5" x 1" 45 75 100 auto off auto off

3" x 2" 40 70 100 110 auto off

3" x 3" 25 45 60 auto off auto off

7.4 V 730 mAh

2.5" x 1" 30 60 auto off auto off auto off

3" x 2" 30 60 80 100 115

3" x 3" 20 40 50 65 80

7.4 V 480 mAh

2.5" x 1" 30 60 auto off auto off auto off

3" x 2" 30 60 80 auto off auto off

3" x 3" 25 45 60 70 auto off

Weight Breakdown (Last Year)System Item Mass (in g)

Propulsion:Motor Firefly (w/ mounting nut) 18.60Prop GWS 2x2 1.60Motor Controller Apl06 3.80Servo Bluebird (w/ control arm & push-pull rods) 4.45Servo Bluebird (w/ control arm & push-pull rods) 4.45Battery Pack 11.1V 300mA-hLiPo packs 22.60Receiver Micro 05S 9.00Camera System Camera, transmitter, connectors 7.05

Subtotals: 71.55

Airfoils:Airfoil Airfoil 12.78

Calculated Pods:Pod Pod 11.08

Total: 95.41

19%

2%

4%

5%

5%

24%

9%

7%

13%

12%

Motor

Prop

Motor Controller

Servo

Servo

Battery Pack

Receiver

Camera System

Airfoil

Pod

Weight Breakdown (Current Team)System Item Mass (in g)

Propulsion:Motor Feigao 17.20Prop EP0320 0.90Motor Controller Phoenix 10 9.70Servo Bluebird (w/ control arm & push-pull rods) 4.45Servo Bluebird (w/ control arm & push-pull rods) 4.45Battery Pack 7.4V 730mA-h LiPo packs 33.70Receiver Berg 4L 5.42Camera System Camera, transmitter, connectors 7.05

Subtotals: 82.87

Airfoils:Airfoil Airfoil 12.78

Calculated Pods:Pod Pod 9.10

Total: 104.75

16%

1%

9%

4%

4%

33%

5%

7%

12%

9%

Motor

Prop

Motor Controller

Servo

Servo

Battery Pack

Receiver

Camera System

Airfoil

Pod

BudgetItem Description Quantity Cost Per Unit Total CostMaterials Carbon Composites* 50in x 5yd 200.00

2-cell 480 mah li-poly battery pack 1 28.95 28.952-cell 730 mah li-poly battery pack 1 31.95 31.953-cell 48- mah li-poly battery pack 1 39.95 39.95Medusa brushless motor 1 42.95 42.95Feigao brushless motor 1 32.99 32.99

ESC CC Phoenix 10 2 57.98 115.96EP2510 5 0.75 3.75EP4025 5 0.95 4.75EP0330 5 0.80 4.00EP3020 5 0.80 4.00Receivers 2 34.95 69.90"Trainer" Airfoil* 1 131.70 131.7Digital Scale* 1 79.94 79.94Total 790.79

Batteries

Motors

Propellers

SDII ScheduleSDII Schedule Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 Week 9 Week 10

Flight Test Old MAV

Build Body for new motor

Flight Test New MAV w/ new motorBuild Body with adjusted angle of attackFlight test with adjusted angle of attackBuild body with trimmed tail

Test body with trimmed tail

Mold for wing and pod

Make new wing

Compare wings

Make new pod

Test new pod

Further testing and optimizaiton

Use trainer for flight simulation