University of Nebraska - Lincoln

Advisors

Team Overview

MissionDesign and build a launch vehicle to reach an altitude of

5,280-Feet AGLDeploy Scientific payload Recover all components in a reusable condition

Management

Team Leaders

Faculty AdvisorDr. Kevin Cole

NAR/TRA MentorThomas Kernes

Project DirectorMatthew Mahlin

Safety CoordinatorPaul Kubitschek

Outreach Coordinator

Bryan Kubitschek

Airframe TeamPaul Kubitschek

Avionics TeamAlyssa Koch

Payload TeamAlexandra Toftul

Propulsion TeamSydney Schaaf

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University of Nebraska - Lincoln

Mission Profile

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University of Nebraska - Lincoln

Preliminary Design Discussion

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University of Nebraska - Lincoln

Vehicle Overview - Deimos

Length: 124.5”Diameter: 5.5”

Nose Cone: 27.5” Von Kármán (LD-Haack), 1:5 Fineness Fin Span: 14.5” (3-fin configuration)

Weight: 26.5 lbs (No Motor – No Payload – Estimated)Motor Mount: 98mm 37” long – rear retaining ring

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University of Nebraska - Lincoln

Stability CharacteristicsOpenRocket ModelWill need to be verified

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University of Nebraska - Lincoln

Plans for Vehicle Safety

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Risk Consequence Precautionary Measures

Contact with Hazardous Chemicals and Materials

-Bodily Injury: Irritation, burns, and allergic reaction-Work stoppage

-Material Safety Data Sheets of all hazardous chemicals and materials will be available to and reviewed by all members. -Facilities with fume hoods will be used for caustic materials.-Protective equipment including, but not limited to, gloves, safety glasses, and filtered face masks.

Misuse of Power Tools -Bodily Injury: Cuts, Abrasions, and Bruises-Work stoppage

-Instructions will be given prior to student use of equipment.-Experienced technicians or upper classmen must be present for all machining.

Unintentional Ignition of Igniters or Electric Matches

-Bodily Injury: Minor Burns-Fire-Lose of critical supplies

-All electric matches will be shorted together at their ends.-Proper storage in secure grounded case

Unintentional Detonation of Black Powder

-Bodily Injury: Serious Burns, and hearing loss

-Ejection charges will be filled last with flight computers deactivated. -Handlers will wear work gloves and Ear Plugs.

Unintentional Ignition of Motor -Bodily Injury: Serious Burns, Bruises, Loss of Life-Cancellation of Flight-Property Damage

-All motors stored unloaded without igniters.-Prepared motors will not be loaded with igniters until mounted on pad.-Loading must be supervised or performed by Certified personnel.

Component Damage Through Testing

-Increased costs-Project Delays-Redesigns

-Grounded equipment used when handling sensitive electronics.-Wearing necessary and precautionary safety equipment.-Only required personnel allowed in proximity to components during testing.-Checklists utilized to ensure proper procedures during operation.

Launch and Recovery Problems -Loss of Vehicle-Loss of Payload-Serious Bodily Injury or Death-Property Damage

-Following TRA/NAR Safety Code-Use of checklists.-Cancellation of Launch in event of adverse weather conditions.-All personnel must be at safe distance before ignition system is armed.

University of Nebraska - Lincoln

Launch CharacteristicsCandidate Motor

Aerotech L1120W-P75mm motor

Simulation Parameters12 foot guide rail

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University of Nebraska - Lincoln

Functional Requirements

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System Subsystems Functional RequirementNosecone Primary System

Communications Array

-Reduce drag force -Must not deform under flight loading-House communications array-Mount drogue parachute-Couple with Sustainer-Transmit GPS location to Ground Station

Sustainer Assembly

Primary System

Recovery Systems

Avionics Bay

-House recovery and avionics bays-Must not deform under flight loading-Couple to Nosecone-Couple to Booster-House Drogue Parachute-House Main Parachute-House Payload-House Flight Computers-Mount Ejection Charges-Allow external access-Mount both parachutes to bulkheads

Booster Assembly Primary System

Fins

Motor Mount Tube

-House motor mount tube-Fin Mounting-Couple to Sustainer-Must not deform under flight loading-Transfer fin moment-Stabilize vehicle for flight-Must not deform under flight loading-Transfer axial motor thrust load-Mount Parachute to Engine Block-Retain motor-Allow quick installation of motor

University of Nebraska - Lincoln

Launch Vehicle Verification

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Subsystem Test Plan Verification Metric Target Date

Altimeter Accuracy

-Subscale Test flights -Agreement between altimeters

January 2012

Recovery System Deployment

-Ground Simulation-Test flights

-Components ejected forcefully-Visually confirm deployment-Vehicle recovered intact

December 2011

Tracking Equipment

-Ground distance test-Test flights

-Line of sight transmission at least 1 mile-Successful tracking after launch

January - March 2012

Motor integration -Test fit-Fit adapter if needed

-No shifting of motor-Motor housed internally

January 2012

Altitude -Full scale test flight for both candidate motors-Add ballast as needed

-Compare recorded altitudes with that of simulations

February – March 2012

University of Nebraska - Lincoln

Vehicle System Overview

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University of Nebraska - Lincoln

Assembly

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University of Nebraska - Lincoln

NoseconeCharacteristics

Von Kármán (LD-Haack)1:5 Fineness

CommunicationsGPS TransmitterAntenna

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University of Nebraska - Lincoln

Sustainer AssemblyComponents

Avionics bay MountingSide Hatch

MaterialBlue TubeFiberglass (8oz)Glass Sock

DimensionsLength - 48 inAV bay length - 12in

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University of Nebraska - Lincoln

Avionics Components

Perfectflite StrattoLoggerFeatherweight Raven

Concept of OperationAccess from Side hatchActivated by external key switchesPrimary charge fired by both altimetersSecondary charge fires 5 seconds later by Raven

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Raven

StrattoLogger

LiPo

LiPo

University of Nebraska - Lincoln

RecoveryComponents

MountingNosecone Tethered to SustainerSustainer Tethered to BoosterForged U-Bolts

Concept of OperationsDrogue @ ApogeeMain @ 2,700-Feet

Component Characteristic Dimension CommentMain Parachute 108” 27ft/s descent rate, 24” Spill hole

Drogue 24” 130ft/s descent rate, X-FormShock Cord 52’ 1” Tubular Nylon

Nomex Wadding 24” Fireproof protection

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University of Nebraska - Lincoln

Booster AssemblyComponents

98mm MMT + Retaining RingFins x 3Coupler

MaterialBlue TubeFiberglass (8oz)Glass Sock

DimensionsLength 48 in

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University of Nebraska - Lincoln

FinsMaterial

5mm thick Tri-PlywoodFiberglass Vinyl Ester Resin

ConstructionLaser cuttingHand sandingVacuum Bagging

AssemblyMounting to MMTBond to boosterTip to tip

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University of Nebraska - Lincoln

Scientific Payload Discussion

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University of Nebraska - Lincoln

Baseline payload design

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University of Nebraska - Lincoln

Baseline payload design

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Subsystem Pre-Flight Test Plan Verification Metric Target Date

Payload Airframe • Drop test Visually verify wind deployment

February 2012

Primary and secondary windbelt

systems

• Detect induced voltage in coils

• Airspeed/resonance relationship

Voltage detected in coil > 30mV and exhibits period structure (not

noise)

December 2011

Active windbelt tension control system

• Interface micro with servo/belt

• Interface micro with anemometer

Frequency of voltage waveform = expected frequency for known

wind speed

January 2012

Sensors and transmitter

• Compare sensor data to know values

• Transmit data

Sensor output values (received data ) w/in 1% of known values

(transmitted data)

January 2012

Power conversion system

• Input several AC waveforms and verify

DC conversion/smoothing

via scope• Measure via micro and compare to scope value

Visually verify smoothed DC

waveform/micro measurement w/in 1% of scope measurement

February 2012

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University of Nebraska - Lincoln

Activity Plans

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University of Nebraska - Lincoln

Major Milestone Schedule

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28 November 2011 PDR report dueBegin construction of UAVFinish construction of UAVBegin testing of UAV systems

5-16 December 2011 PDR Presentation

Evaluate necessary design changesFinish construction of RocketComplete testing of ejection system

January 2012 First Test LaunchVisit local Schools (Park Middle School)Verify Altimeter Accuracy and Agreement

23 January 2012 CDR report due1-10 February 2012 CDR PresentationFebruary 2012 Second Test Launch

Choose competition motor26 March 2012 FRR report due2-11 April 2012 FRR Presentation19-20 April 2012 Flight hardware and safety checks21 April 2012 Launch Day7 May 2012 PLAR due

University of Nebraska - Lincoln

Budget

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Sub-group Item Needed Price # Estimate # Purchased Purchase CostAirframe BT 5.5in 56.95 2 113.9 2 113.9(allocated:$2000) BT Coupler 55.95 1 55.95 1 55.95(Updated 8/31/2011) Kevlar Sock(per ft) 3.51 24 84.24 30 105.22

Glass Sock(per ft) 1.8 16 28.8 25 45.0498 mm MMT 15.47 1 15.47 2 30.9575 mm MMT 14.49 0 0 1 14.495 mm Plywood 4x8 10 1 10 1 11.63All-Thread 6 3 18 1 5.99U-Bolts 5 4 20Misc Hardware 50 1 50Main Parachute 150 1 150Shock Cord 3 50 150Drogue Chute 40 1 40Nosecone Mold 30 1 30

766.36 Current Subtotal 383.17Avionics Flight Computer A 100 1 100(allocated:$1250) Flight Computer B 155 1 155 1 75.5(Updated 8/31/2011) Key Switches 2 0

Arduino 30 1 30Antenna 20 1 20Transciever 70 2 140Electronic Components 25 1 25Radio Beacon 30 1 30

500 Current Subtotal 75.5Payload Ram-Airfoil 75 0(allocated:$2000) Servos 30 6 180(Updated 8/13/2011) Camera 50 1 50

Arduino 40 2 80Sensors 400 1 400Antenna 20 2 40Transciever 70 2 140Misc Components 610 1 610

1500 Current Subtotal 0Propulsion L-Class Motor 200 2 400(allocated:$1000) 75 mm Motor Hardware 300 1 300(Updated 8/13/2011)

840 Current Subtotal 0Outreach Water Rocket Pad 120 1 120 1 100(allocated:$250) Stomp Rockets 50 1 50(Updated 8/13/2011) Misc Supplies 80 1 80

250 Current Subtotal 100Total Estimate3856.36 Current Total 558.67$

Allocated Total: 7,000.00$ Unspent: 6,441.33$

Subtotal Estimate

Subtotal Estimate

Subtotal Estimate

Subtotal Estimate

Subtotal Estimate

University of Nebraska - Lincoln

Outreach• Previous Activities

• Engineering Week• Astronomy Day• Lockheed Martin Space Day

• Current Collaborations• Water Rocketry

• Demonstration• Construction• Launch

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Questions?