interim design review
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Interim Design Review. Group 13 – Flapping Wing MAV NASA Parker Cook George Heller Joshua Nguyen Brittney Theis. The Customer. Dr. Shih Funding to be provided by the NASA Ames facility. The Problem. - PowerPoint PPT PresentationTRANSCRIPT
Interim Design ReviewInterim Design Review
Group 13 – Flapping Wing MAVGroup 13 – Flapping Wing MAVNASANASA
Parker CookParker CookGeorge HellerGeorge HellerJoshua NguyenJoshua NguyenBrittney TheisBrittney Theis
The CustomerThe Customer
- Dr. ShihDr. Shih- Funding to be Funding to be
provided by the provided by the NASA Ames facilityNASA Ames facility
The ProblemThe Problem
- We are tasked with designing and We are tasked with designing and building a micro aerial vehicle (MAV) building a micro aerial vehicle (MAV) that is competition legal for the that is competition legal for the European Micro Air Vehicle European Micro Air Vehicle Conference and Flight Competition.Conference and Flight Competition.
Project Scope and NeedsProject Scope and Needs
OperationOperation SpecificationSpecification
Flight TypeFlight Type Flapping WingFlapping Wing
Flight TimeFlight Time 10mins10mins
Ground ClearanceGround Clearance 5m5m
Flight DistanceFlight Distance 50m50m
Degrees of FreedomDegrees of Freedom 33
Size SpecificationsSize Specifications 10cm x 10cm x 10cm10cm x 10cm x 10cm
WeightWeight 100g100g
Ease of OperationEase of Operation 1 user1 user
Design InspirationDesign Inspiration
The Delfly inspired design was chosen as our flapping wing The Delfly inspired design was chosen as our flapping wing MAV because of its ability to meet our customers needs and MAV because of its ability to meet our customers needs and has the highest probability to fulfill our design criteria and has the highest probability to fulfill our design criteria and complete all necessary functions.complete all necessary functions.
Gear Train and Wing Gear Train and Wing MechanismMechanism
DimensionsDimensions
– IncludesIncludes DrivetrainDrivetrain
WingsWings
FuselageFuselage
Connection rods Connection rods
Wingtip speed vs. body mass
Wing length vs. body mass
Wing loading vs. mass of man made objects
Wing CalculationsWing Calculations
Lift and thrust as a function of wing area
Stiffness effect on wing lift performance
U=forward flight speed
Φ=total flapping angle
f=flapping frequency
b=wing span
Motor SelectionMotor Selection
Voltage RPM Current (free) Current (stall)
1.5V 10100 12.4mA 36.8mA
3.0V 20300 17.6mA 73mA
5.0V 32500 - -
– Tiny Pager MotorTiny Pager Motor by by SolarboticsSolarbotics
– Diameter = 4mm (0.158”)Diameter = 4mm (0.158”)– Length = 16.4mm (0.65”)Length = 16.4mm (0.65”)– Shaft Diameter = 0.66mm Shaft Diameter = 0.66mm
(0.026”)(0.026”)– Weight = 1g (.035oz)Weight = 1g (.035oz)
Gear Size CalculationGear Size Calculation
– Nylon Gears will be used to minimize weightNylon Gears will be used to minimize weight
– Frequency will need to be 35HzFrequency will need to be 35Hz
– Gear Ratio taken to be 4.81:1Gear Ratio taken to be 4.81:1
Great Planes ElectriFly 4Ch FM Rx 72MHz
Futaba FM Receiver Crystal Short R114F 72MHz High
Hitec Eclipse 7 7-Channel FM/4
Component SelectionComponent Selection
Battery: 110mAh 1S 3.7V LiPo: BMCX
Servos:
- The servos for the control surfaces of the MAV would need to be very tiny, and are not commercially available.
- Piezo-electrics were researched, but would require more power than we could supply.
Component SelectionComponent Selection
Wing Material SelectionWing Material Selection
- McMaster Polyester (PET) FilmMcMaster Polyester (PET) Film - Thickness: .001“Thickness: .001“- Width: 40“Width: 40“- Length: 10' Length: 10' - Tensile Strength: 28,000 psiTensile Strength: 28,000 psi- Clear, No Tint, Weather ResistantClear, No Tint, Weather Resistant
““Bones” Material SelectionBones” Material Selection
Weight Carbon Tube Carbon Rod Aluminum Wire Steel Wire
Price for 48” .2 4 3 2 1
Length .1 3 3 2 1
Volume .4 1 2 4 3
Tensile Strength .2 2 2 4 1
Stability .2 1 1 3 3
2.1 2.3 3.6 2.3
- McMaster Rigid Carbon Fiber Shape Round McMaster Rigid Carbon Fiber Shape Round TubeTube
- OD: .125“OD: .125“- ID: .074" ID: .074" - Length: 48" Length: 48" - Tensile Strength: 120,000 psiTensile Strength: 120,000 psi
Cost AnalysisCost Analysis
ObjectObject Purchased FromPurchased From AmountAmount PricePrice
Tiny Pager MotorTiny Pager Motor SolarboticsSolarbotics 11 $4.95$4.95
Transmitter:Transmitter:
Hitec Eclipse 7 7-Channel FM/4Hitec Eclipse 7 7-Channel FM/4Towerhobbies.comTowerhobbies.com 11 $239.99$239.99
Receiver:Receiver:
Great Planes ElectriFly 4Ch FM Rx Great Planes ElectriFly 4Ch FM Rx 72MHz72MHz
Towerhobbies.comTowerhobbies.com 11 $24.99$24.99
Battery:Battery:
110mAh 1S 3.7V LiPo: BMCX110mAh 1S 3.7V LiPo: BMCXHorizonhobby.comHorizonhobby.com 11 $10.99$10.99
Polyester (PET): .001” - 8567K12 Polyester (PET): .001” - 8567K12 McMaster-CarrMcMaster-Carr 11 $22.00$22.00
Rigid Carbon Fiber Shape Round Rigid Carbon Fiber Shape Round Tube, .125" OD - 2153T31Tube, .125" OD - 2153T31
McMaster-CarrMcMaster-Carr 11 $12.18$12.18
TOTAL:TOTAL: $315.10$315.10
11 Rudder used for TurningRudder used for Turning
22 Rudder used for increasing/decreasing Rudder used for increasing/decreasing pitchpitch
33 Top WingTop Wing
44 Bottom Wing with rod attachment Bottom Wing with rod attachment pointspoints
55 Base Frame structureBase Frame structure
66 MotorMotor
77 GearGear
88 Rod linkagesRod linkages
99 Pinion GearPinion Gear
1010 Rocker / Wing HolderRocker / Wing Holder
ConclusionConclusion
Part Part QuantityQuantity DescriptionDescription
LR RudderLR Rudder 11 Used for TurningUsed for Turning
UP RudderUP Rudder 11 Used for increasing/decreasing pitchUsed for increasing/decreasing pitch
Top WingTop Wing 22 Made of Mylar and RodsMade of Mylar and Rods
Bottom WingBottom Wing 22 Made of Mylar and Rods, includes rod attachment pointsMade of Mylar and Rods, includes rod attachment points
FrameFrame 11 Base StructureBase Structure
MotorMotor 11 Mechanical MotionMechanical Motion
GearGear 11 Speed reductionSpeed reduction
Rod LinkageRod Linkage 22 Connects gear to wingsConnects gear to wings
Pinion GearPinion Gear 11 Attached to motorAttached to motor
RockerRocker 22 Holds wings in place and pivots about the frameHolds wings in place and pivots about the frame
BatteryBattery 11 Provides powerProvides power
ActuatorActuator 22 Controls ruddersControls rudders
ReceiverReceiver 11 Recieves commands from controllerRecieves commands from controller
ControllerController 11 Controls MAVControls MAV
Bill of MaterialsBill of Materials
Future PlansFuture Plans
– Purchase MaterialsPurchase Materials
– Finalize researchFinalize research
– Find Torque on the ShaftFind Torque on the Shaft
– ResizingResizing
– Find appropriate ServosFind appropriate Servos
– Finalize Design Calculations Finalize Design Calculations
– Finalize Manufacturing PlansFinalize Manufacturing Plans
Questions?Questions?