project a.p.e.s. flight readiness revie gatech usli frr...backup slide – payload science...
TRANSCRIPT
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Project A.P.E.S. Flight Readiness Review
Presented by: Georgia Institute of Technology
Mile High Yellow Jackets
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Agenda 1. Mission Overview (3 Min)
2. Project Budget (1 Min)
3. Project Schedule (2 Min)
4. Educational Outreach Update (2 Min)
5. Launch Vehicle (7 min)
6. Flight Systems (3 Min)
7. Flight Avionics (7 min)
8. Questions (15 Min)
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MISSION OVERVIEW Project A.P.E.S. FRR
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Mission Overview
TO MAINTAIN A SUSTAINABLE TEAM DEDICATED TO THE GAINING OF KNOWLEDGE THROUGH THE DESIGNING, BUILDING, AND LAUNCHING
OF REUSABLE LAUNCH VEHICLES WITH INNOVATIVE PAYLOADS IN ACCORDANCE WITH THE NASA UNIVERSITY STUDENT LAUNCH
INITIATIVE GUIDELINES.
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Requirements Flow Down
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Mission Objectives& Success Criteria
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Mission Timeline
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PROJECT BUDGET Project A.P.E.S. FRR
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Flight Vehicle Expenditure Summary
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PROJECT SCHEDULE Project A.P.E.S. FRR
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Critical Path Chart
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EDUCATIONAL OUTREACH Project A.P.E.S. FRR
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Educational Outreach • Goal: Promote interest in
STEM fields
• Educators can request presentations or hands-on activities for their classroom
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Education Outreach Activities
Activity Date No. of Students & Educators Reached
FIRST LEGO League Jan. 28th 700+
Civil Air Patrol Model Rocketry Program
April 5th, April 20th
20-30
National Air & Space Museum Discovery
Station
March 24th ~137 (in 2 hrs.)
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First LEGO League EO Event National Air & Space Museum Discovery Station
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LAUNCH VEHICLE Project A.P.E.S. FRR
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Changes Since CDR
• The main parachute diameter was reduced from 12 ft. to 10 ft. • The new landing velocity under the 10 ft. diameter main
parachute is 17 ft./s with a corresponding maximum landing kinetic energy of 62.2 ft.- lbf .
• The ejection charge masses have been reduced from 3.6g and
4.5g to 3.0g and 4.0g respectively.
• L-brackets have been added to the recovery system bulkheads at epoxy joints for added strength.
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Launch Vehicle: Summary • Predicted apogee: 5312 ft • Stability margin: 2.5 calibers • Motor: AeroTech L850
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• 47 ft/s at 60 inches up the rail • Max Mach 0.57 • Total weight: ~31 lbs • Dual deployment
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Launch Vehicle: Fins • Material: Carbon fiber honeycomb • Attachment: Epoxy
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Variable Value
Number of fins 3
Root chord 15 in
Tip chord 3 in
Height 6 in
Sweep Angle 59.6°
Sweep Length 9.8 in
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Launch Vehicle: Fin Testing • 28 lbf applied at aerodynamic center of fin • Corresponds to 3x greater than expected drag force
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Launch Vehicle: Booster Section • Material: Aluminum and wood • Attachment: Nuts, bolts, and epoxy
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Thrust Plate
Retention Plate
Thrust Retention System
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FEA Analysis & Results
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Part Material Force applied (lbf)
Max displacement (inches)
Max stress (psi)
Safety factor
Thrust Plate
BS1088 Plywood
408 .00838 404.6 3.3
Stringers AL 6061 408 .00526 483.3 2.9
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Launch Vehicle: Thrust plate Testing
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Integrated Modular Payload System (iMPS) • Material: G10 Fiberglass, bolts
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Rib FEA
Load 684 lbf
FS 4.7
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Payload Structure Impact Test
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Impactor mass (kg)
Factor of Safety
Impact Energy
(J)
Impactor Height (in)
Stringer length
(in) Notes
3.98 1 5.23 11.08 14 Pass 3.98 2 10.47 22.16 14 Pass 3.98 3 15.70 33.24 14 Pass
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Skin – Test Vehicle, Korsakov
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Korsakov Estimated Flight Profile
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Launch Vehicle: Recovery • Dual deployment system • Altimeter: 2 StratoLoggers for redundancy
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Main Ejection Charge
Altimeter Battery Power Switch
Altimeter Battery Power Switch
Drogue Ejection Charge
Main Ejection Charge
Drogue Ejection Charge
Main Chute
Drogue Chute
Mass (lbs)
Velocity (ft/sec)
KE (ft-lb)
KE Margin (ft-lb)
Nose Cone 1.59 17 7.2 90.5% Booster Section 7.59 17 34.2 54.5%
Payload Section 13.82 17 62.2 17.1%
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Launch Vehicle: Recovery Testing Black powder ejection charges: Drogue: 3 grams Main: 4 grams
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Launch Vehicle: Drift Profile
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Drift From Launch Pad at Various Wind Speeds
Drif
t (ft)
Wind velocity (mph)
Test data point supporting accuracy of Recovery Calculations located in the back-up slides
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Launch Vehicle: Recovery – Drogue
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Thrust Plate
Chute Simulant
Structure Rib
Ejection Charges
U-bolt
Recovery Chamber
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Launch Vehicle: Recovery – Main
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Nose Cone Chute
Simulant
Wooden Bulkhead
Ejection Charges
Structure Rib
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Launch Vehicle: Full Scale Flight Test Location: Manchester, TN Motor: L990 motor Altitude: 4,910 ft. Failures: Main Parachute Deployment Failure
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Launch Vehicle: Mass Breakdown
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Component Weight (lbs) Nose Cone 1.6 Avionics System/Payload 2.9 Ballast 5.0 Payload & Recovery Structure 5.9 Parachutes and Shock Cords 4.2 Booster Structure 3.9 AeroTech L850 Motor 8.3 Total 31.8
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Launch Vehicle: Finished Product
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FLIGHT SYSTEMS Project A.P.E.S. FRR
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Flight Systems Responsibilities • Payload • Avionics • Communications • A.P.E.S. Ground Testing
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Flight Systems: Payload
Copyright: NASA
Copyright: NASA
• Current solutions to the problem of eliminating natural frequency oscillations • Mechanical C-Spring Isolators • Tuned Oscillation Arrays • Long duration exposure without blurring
• Use of advanced isolation components adds mass and design constraints
Copyright: NASA Copyright: NASA
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Flight Systems: Expanded Views
Payload Integration Expanded View
A.P.E.S. Expanded View
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Flight Systems: Universal Mounting Bracket • Repeatable
manufacturing
• Few constraints on Payloads
• Ease of mounting hardware
• High durability **Deformation Exaggerated
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Flight Systems: A.P.E.S.
Solenoids
Platform
Universal Mounting Bracket
Magnets
Retention Ring
LEDs Camera
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FLIGHT AVIONICS Project A.P.E.S. FRR
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A.P.E.S. Computer
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• BeagleBoard xM – ARM TI DM3730 – ~850 BogoMIPS – Hardware DSP – 512MB DDR RAM – NEON CoProcessor – 3x i2c Bus – 2x webcams
• Linux – Kernel 3.2 – Angstrom (flight) – Xubuntu (development) – OpenCV – DSP optimized GStreamer
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Platform Localization
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A.P.E.S. Controller PID Control System to be Implemented
proportional-integral-derivative feedback loop Setpoint: platform in center of module
Error: distance from setpoint
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Field Generation and Control • 5x TI DRV103 Solenoid driver ICs • 12x solenoids with ~300 turns of 30 gauge magnet wire • 1x Large Z axis Solenoid
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Data Storage (OpenLog)
Flight Systems: Avionics Flight computer board • ATmega 2560
• OpenLog • Xbee Pro
• Sensors
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Sensors Used • ADXL345 Triple Axis Accelerometer
– Logs orientation and acceleration – Data sent to A.P.E.S. controller and logged
• HMC1043 3-Axis Magnetic Sensor
– Magnetic field strength logging
• Fastrax UP501 GPS Module – Tracking data for logging and recovery
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Telemetry and Communication
• 100mW Transceiver • 902-928MHz FHSS • Reliable Delivery • 10kbps RF Data Rate • Up to 6 mile Line of Sight Outdoor Range
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Safety Considerations
Transmitter verified to not ignite e-matches at maximum power
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Flight Systems: Ground Station Comm
• GPS Data will be received via Xbee pro
• Xbee Explorer will convert data packets
• Data sent to computer and displayed on map
Xbee Explorer
GPS Data
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Questions?
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BACK-UP SLIDES Project A.P.E.S. FRR
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TEAM OVERVIEW Project A.P.E.S. FRR Back-up Slides
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Team Summary Team Summary
School Name Georgia Institute of Technology Team Name Mile High Yellow Jackets Project Title Active Platform Electromagnetic Stabilization
(A.P.E.S.) Launch vehicle Name
Vespula
Project Lead Richard Z. Safety Officer Matt S. Team Advisors Dr. Eric Feron, Dr. Marilyn Wolf NAR Section Primary: Southern Area Launch vehicle (SoAR)
#571 Secondary: GA Tech Ramblin’ Launch vehicle Club #701
NAR Contact Primary: Matthew Vildzius Secondary: Jorge Blanco
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Georgia Tech Team Overview • 7 person team composed of both undergraduate and
graduate students – Grad Students: 2 – Undergraduates: 15
• Highly Integrated team across several disciplines
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Field No. of Students
Aerospace Engineering 9
Electrical Engineering 6
Computer Science/ Computer Engineering 3
Mechanical Engineering 2
Mathematics 1
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SYSTEM REQUIREMENTS VERIFICATION MATRIX
Project A.P.E.S. FRR Back-up Slides
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Launch Vehicle RVM
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Launch Vehicle RVM
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Launch Vehicle RVM
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Flight Systems RVM
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Flight Avionics RVM
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PROJECT BUDGET SUMMARIES Project A.P.E.S. FRR Back-up Slides
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Project Budget: Summary
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Actual vs. Predicted Budget
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PROJECT SCHEDULE RISK SUMMARIES
Project A.P.E.S. FRR Back-up Slides
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Project Schedule: Low-to-Moderate Risk
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Project Schedule: Low-to-Moderate Risk
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LAUNCH VEHICLES Project A.P.E.S. FRR Back-up Slides
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Backup Slide - Flight Profile
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Backup - Payload Structure – Test Result
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Backup Slide – Recovery Calculations
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Black Powder Equation:
- Volume to be pressurized accounts for the parachute packaging - Pressure calculated at deployment height for each parachute
Backup Slide – Recovery Calculations
𝐹𝑝𝑝𝑝 =𝜎𝜎𝑑2
4
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Backup Slide - Korsakov Drift
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Launch Site
Landing Site
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Backup Slide - Flight Test Investigation
• Structural Failure at Epoxy seam
• Landing damage on skin
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FLIGHT SYSTEMS: PAYLOAD Project A.P.E.S. FRR Back-up Slides
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Backup Slide – Payload Science • Interaction of magnetics fields and permanently
magnetic or ferromagnetic substances • For ferromagnetic substance:
𝐅 𝐫,𝐦𝒔,𝐦 =3𝑉𝑁2𝐼2𝑆2𝜇𝜒𝑚
16𝜎2𝑟7𝐧� ∙ 𝐫� 𝐧� − 𝐫� − 4 𝐧� ∙ 𝐫� 2𝐫�
• For permanently magnetic substance: 𝐅 𝐫,𝐦𝒔,𝐦 =
3𝑉𝑁𝐼𝑆𝜇04𝜎𝑟4
𝐧� ∙ 𝐫� 𝐌 + 𝐌 ∙ 𝐫� 𝐧� + 𝐧� ∙ 𝐌 𝐫� − 5 𝐧� ∙ 𝐫� 𝐌 ∙ 𝐫� 𝐫�
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Backup - Detailed Ground Testing Results Initial Steady-State DC Ground
Testing of Solenoid
y = -84.755x3 + 1504.2x2 - 8998.6x + 18214 R² = 0.9998
0
200
400
600
800
1000
1200
0 2 4 6 8
μT
Distance (cm)
X Tot
Characteristic Value
Turns 300
Resistance 2.6 Ω
Wire Gauge 30
Field Strength @ 0.86A
1100 μT
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Preliminary Solenoid Ground Testing
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Adjusted X (µT) vs. Distance (cm) by Current (A)
0.2 0.4 0.6 0.8 0.86
Current (A)
Distance (cm)
0 1 2 3 4 5
X (µ
T)
0
50
10
15
0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5 0 1 2 3 4 5
Columns
Adjusted X (µT)
X (µT)
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Alternative Response Surface Fits
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Response Surface: Goodness of Fit
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Flight Systems: Ground Test Plan Goals: 1. Develop Control Theories 2. Confirm Force Equations 3. Produce Flight Experiment
Ground Test Sequence 1. Sensor Calibration 2. 1-D Testing 3. 2-D Testing 4. 3-D Testing 5. Flight Model Test
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Flight Avionics Schematic
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FLIGHT SYSTEMS: FLIGHT AVIONICS Project A.P.E.S. FRR Back-up Slides
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Power Budget: Overview
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Power Budget Detailed Summary
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