Maple SeedsMaple SeedsConcept GenerationConcept Generation

Group Members:Group Members:

Clinton BencsikClinton BencsikMark BroscheMark BroscheChris KulinkaChris KulinkaChris RedcayChris Redcay

IntroductionIntroduction Customer: Harris CorporationCustomer: Harris Corporation Project: Maple Seed-Inspired Sensor arrayProject: Maple Seed-Inspired Sensor array

U.S. Military useU.S. Military use Probably in desert environmentsProbably in desert environments

Very open-ended design specificationsVery open-ended design specifications TodayToday

Existing products and ideasExisting products and ideas Critical AssumptionsCritical Assumptions Our ConceptsOur Concepts Final design choiceFinal design choice

ProblemProblem

Create a sensor housing which Create a sensor housing which incorporates auto-rotating flight incorporates auto-rotating flight

Sensors will be dropped from an altitude Sensors will be dropped from an altitude via aircraftvia aircraft

PurposePurpose Detect disturbances caused by human or Detect disturbances caused by human or

vehicle movement vehicle movement Relay information to centralized computerRelay information to centralized computer

Priority of Sub-problemsPriority of Sub-problems

Sub-ProblemsSub-Problems RankRank

Flight CharacteristicsFlight Characteristics 11

TransmittingTransmitting 55

SensingSensing 44

PowerPower 33

DurabilityDurability 22

Customer RequirementsCustomer RequirementsENGINEERING REQ.

 

TotalMass

MaterialFractureStrength

Young's Modulus

MaterialMachinability/

FormabilityCost

TerminalFreefallVelocity

CUSTOMER

REQ

Fall slowly X         X

Survive fall   X X      

Hold sensors       X    

Retain shape after impact   X X     X

Retain function after impact   X X     X

No moving parts           X

Auto-rotates like maple seed X         X

Cost per Seed ~$1500-$2500 X X X X X  

               

  2 37.9 0.8 High $1,250 2.5

Units kg Mpa Gpa   Dollars m/s

ENGINEERING TARGETS

Existing ProductsExisting Products• Lockheed Martin (NAV)

• ~$1.7 million in Nano Air Vehicle Program

• Program was quietly canceled

• Maple Seed Copter Toy

• Uses the principles of maple seed flight

Critical AssumptionsCritical Assumptions

Solar poweredSolar powered Energy storageEnergy storage

Auto-rotating flightAuto-rotating flight No moving partsNo moving parts

Sense human / vehicle presenceSense human / vehicle presence Triangulate disturbanceTriangulate disturbance

Networking & wireless transmission Networking & wireless transmission capabilitiescapabilities

Sensor ConceptsSensor Concepts Customer suggestionsCustomer suggestions

Infrared sensorsInfrared sensors Seismic sensorsSeismic sensors

Other optionsOther options Microphone sensorsMicrophone sensors

Using sound waves through Using sound waves through air & groundair & ground

Accelerometers Accelerometers Used to detect vibrationUsed to detect vibration

Motion sensorsMotion sensors

Flight Concepts _Flight Concepts _

Maple seed (auto-rotating)Maple seed (auto-rotating) Single wingSingle wing Double wingDouble wing

Increased wing areaIncreased wing area Increased cargo spaceIncreased cargo space

LightweightLightweight Increases flight timeIncreases flight time Narrows material selectionNarrows material selection

Flight ConceptsFlight Concepts

Concept Screening MatrixConcept Screening Matrix

Screening Matrix

Final Design ChoiceFinal Design Choice

FlightFlight Auto-rotating single wing sensor housingAuto-rotating single wing sensor housing

Sensing MethodSensing Method Combination microphone and IR sensorCombination microphone and IR sensor

Material SelectionMaterial Selection SDM housing with possible carbon fiber wingSDM housing with possible carbon fiber wing

Power Power Solar power with either a charged battery or Solar power with either a charged battery or

capacitorcapacitor TransmissionTransmission

Wi-fi data transmissionWi-fi data transmission

ConclusionConclusion

Used Customer needs to determine Used Customer needs to determine problems and sub-problemsproblems and sub-problems

Sorted sub-problems by importance and Sorted sub-problems by importance and compared them to our concepts to compared them to our concepts to determine final designdetermine final design

Future PlansFuture Plans Build prototypes for flight testsBuild prototypes for flight tests

Find proper ratio of weight to wing spanFind proper ratio of weight to wing span Test microphones for disturbance sensitivityTest microphones for disturbance sensitivity

Design a basic circuit for amplifying disturbance Design a basic circuit for amplifying disturbance signalsignal

Test battery vs. capacitorTest battery vs. capacitor Which will work better in extreme environment Which will work better in extreme environment

conditionsconditions Find maximum achievable power using mini Find maximum achievable power using mini

solar panels over small surface areasolar panels over small surface area

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