station for exploratory analysis and research center for...
TRANSCRIPT
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Station for Exploratory Analysis and
Research Center for Humanity (SEARCH)
Authors: Jasmine Wong, Matthew Decker, Joseph
Lewis, Megerditch Arabian, and Dr. Peter Bishay
California State University, Northridge
Region VI Student Conference, April 1-3 2016
Oregon State University, Corvallis, OR
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SEARCH: Need
• Permanent Human Expansion
• Microgravity Space Flight ▪ Muscle and Bone Atrophy
▪ Visual Impairment
▪ Embryo Development
• More Research
• 1G Environment
• Extended Earth-Resupply Independence
Required for Future Missions
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SEARCH: Proposed Design
• Mission Architecture
• Mission Timeline
• Budget
• Spacecraft Design and Mission
Specifications
• Technology Readiness
• Suggested Secondary Missions
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SEARCH: Presentation Content
• Mission Architecture
• Mission Timeline
• Budget
• Spacecraft Design and Mission
Specifications ▪ 1G Method
▪ Structural Design
▪ Propulsion
▪ Orbit Selection
▪ Power
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SEARCH: Presentation Content
• Spacecraft Design and Mission
Specifications - Continued ▪ Thermal
▪ Radiation
▪ Life Support
▪ Communications
▪ Robotic Maintenance
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SEARCH: Mission and Timeline
• Artificial 1G Space Station ▪ 16-24 people
▪ 30 year Earth-Resupply Independent
Experiment
6 First Baby Born in Space
R&D
Mfg. & Assy.
Verification at 1G
Independence
First Launch to LEO
Transfer to Lunar Orbit
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SEARCH: Budget
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• Derived from
NASA FY 2016
budget ▪ Assumptions and
exceptions
• Launch schedule
and design
drive budget
allocation
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SEARCH: Artificial Gravity
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• Rotation chosen
for creating 1G
environment ▪ Speed: 4 rpm
▪ Radius: 56 m
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SEARCH: Structure Design
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• 24 Linear
Structural Modules
• 6 Inflatable
Habitats
• Central Hub
• Truss
• Stabilization
Cables
• Robotic Arm Track
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SEARCH: Structure Design
• Structural Modules ▪ 3 Layer Wall
▪ Flexible Coupling
• Stabilization Cables ▪ Restrain Radial
motion
▪ 6x25 IWRC Filler
Cable
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• Inflatable HABs ▪ 5 Layer Wall
– Nextel
– Polyurethane
open cell foam
– Kevlar
– Combitherm
– Nomex
▪ 180° Rotation – HAB Motor
SEARCH: Structure Design
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SEARCH: LEO Assembly
• International Space Station ▪ Assembly Platform
• Friction-Stir Welding
• Launch Vehicles ▪ SLS Block 2B, Falcon Heavy, and Falcon 9
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SEARCH: Orbit Selection
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• Stable Polar Lunar
Orbit ▪ 56.2° Inclination
▪ Highly elliptical
▪ “Dark time”
▪ Daily interaction
with planned
NASA Lunar
outpost
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SEARCH: Rotation & Orbit Maintenance Systems
• Initial spin-up: MR-107N engines
▪ Fuel: Hydrazine
▪ Spin-up time
• NSTAR Engines
▪ Fuel: Xenon
▪ Rotation maintenance
▪ Lunar Orbit Station Keeping
• VASIMR
▪ Fuel: Xenon
▪ Lunar Orbit Altitude Maintenance 14
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SEARCH: Hohmann Transfer
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• Two impulse orbital
transfer maneuver
• Total ΔV = 3.42
km/s ▪ ΔVEarth = 3.18 km/s
▪ ΔVMoon = 0.24 km/s
• TOF = 183 days
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SEARCH: Engine Selection
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• RL-10 Engines ▪ 5.8:1 oxidizer to
fuel ratio
▪ 465s Specific
Impulse
▪ LOX/LH2
• Tsiolkovsky
Rocket Equation
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SEARCH: Power
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• Power Generation ▪ Solar Arrays
– Life Support
System
– Recharge Energy
Storage Devices
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SEARCH: Power
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• Energy Storage ▪ Flywheel System
– Dark Time Power
– Fused Silica Fiber
Composite
▪ Structural Battery
Walls – HAB Motor and
Robotic
Maintenance
System
– Lithium-Ion
Polymer
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SEARCH: Power
• Power Distribution
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HAB Motor
Life Support
Battery Walls
Flywheels Solar Arrays
Day Time Nominal Day Time with Motor Running Dark Time Nominal
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SEARCH: Power
• Power Transmission ▪ Wired Transmission for Nominal Functions
▪ Laser Transmission – For Robotic Maintenance and Repair System
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SEARCH: Thermal Management
• Dual loop cooling
system
• Carbon Fiber
Radiators
• Micrometeoroid /
Orbital Debris
Integrated Multilayer
Insulation
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SEARCH: Radiation
• Passive Protection ▪ Hydrogen heavy composite layer
• Active Protection ▪ External Magnets
• Medical Protection ▪ Regiment of drugs
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SEARCH: Human Systems
• Aquaponic food growing system ▪ Primarily focusing on tilapia, beans, corn, and
squash
• Water recycled through Vapor Phase
Catalytic Ammonia Removal (VPCAR)
system ▪ Projected 98% recycling rate
• Waste removed using Plasma Arc Waste
Destruction System(PAWDS)
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SEARCH: Human Systems
• CO2 Removal ▪ Carbon Dioxide and Moisture Removal
Amine Swing-Bed (CAMRAS) System
▪ Series-Bosch system turns CO2 into Water
and Carbon
• Atmosphere monitored in real time by
Spacecraft Atmosphere Monitoring (SAM)
system
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SEARCH: Communications
• High Gain Antenna (HGA) ▪ Primary source of communication, large data
transfer.
• Low Gain Antennas (LGA) ▪ Emergency backup communications
• Ultra-High Frequency (UHF) Antennas ▪ Communication with vehicles on moon’s
surface
• NASA Deep Space Network (DSN)
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SEARCH: Communications
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• Cassegrain design ▪ Sub reflector, feed
horn
▪ 8 meter dish
• Frequencies ▪ X band
▪ Ka band
• Two Axis Gimbal ▪ Mounted on the
Habitat ring
▪ Maintain LOS with
DSN ground terminal
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SEARCH: Robotics
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• Provides maintenance
for solar arrays,
antennas, HAB motors,
• Composition ▪ AL 7075-T6
• Mass ▪ 2023 kg
• Length ▪ 16 m
• Power ▪ Peak Power: 8 kW
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SEARCH: Continued Work
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• Power, Fuel, and
Consumables
• Fuel Tank
Configuration
• Solar Array Area
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SEARCH: Conclusion
• Artificial 1G Space Station ▪ 16-24 people
▪ 30 year Earth-Resupply Independent
Experiment
▪ Lunar Orbit
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