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StelNav-1000 10/23/2012

StelNav-1000 10/23/2012. Brandon Baker Keegan Colbert Ryan Haughey. Megan Heard Collin Marshall Ben Morales. Travis Ravenscroft. Mission Statement.

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StelNav-1000 10/23/2012

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  1. StelNav-100010/23/2012 Brandon BakerKeegan ColbertRyan Haughey Megan Heard Collin MarshallBen Morales Travis Ravenscroft

  2. Mission Statement “To expand the domain of humanity beyond the earth for the betterment, preservation, and advancement of all humankind by creating a self-sustaining, mobile habitat that ensures the physical and psychological well-being of its inhabitants.” • 24 Month Trip Time • 12 Crew Members • Capable of Interplanetary Space Travel Collin Marshall

  3. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Ben Morales

  4. STRUCTURAL DESIGN Hallway Central Hub Habitable Pod Supporting Truss Structure Transport Tube

  5. External structure Spacecraft Structure Overall Structural Profile Dumbbell Spherical Toroidal Cylindrical Oval Cross Section Square Cross Section Circular Cross Section Tethered Rigid Modular Pods Inhabitable Pods (TRANSHAB) Uniform Cross Section 3 Sections of Two Pods Evenly Distributed Pods Centrally Located Propulsion Square Cross Section Hallways Circular Cross Section Hallways Ben Morales

  6. Design Specifications • Torus Radius: 60 m • Small radius to reduce mass • Preliminary Mass Estimate: 950 MT • Rate of Rotation: 3.86 rpm Keegan Colbert

  7. Layout Benefits • Versatility: • Pods can be added or removed and individually designed • Continuity: • All pods are connected with hallways • Large Living Space • Flat Floors: • Pods do not require curved floors like traditional torus • Zero Gravity Central Hub • Contains propulsion, power generation, and agricultural production • Limited Radiation Shielding: • 23.2 rem/year – 29.2 rem/year built in to the inflatable pods Keegan Colbert

  8. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Megan Heard

  9. Life Support Over the course of 2 years, 12 people would consume: • 7,360 kg oxygen • 26,300 kg water • 18,700 kg food Recycling is essential for any long term independent space habitation Megan Heard

  10. Components • Atmospheric control • Oxygen production and carbon dioxide management • Nutrition • Food production • Waste management • Recycling of liquid and solid waste Megan Heard

  11. Atmospheric Control • Algae will be used for O2 production and CO2 elimination • 96 m2 of algae can provide O2 for a crew of 12 • 3 pods will have 48 m2 tanks below the lowest floor • Algae will require 30 kg of water and will use sunlight to power photosynthesis • Mechanical filtration will be used to remove other impurities from the air Megan Heard

  12. Atmospheric Control • The algae grown will be arthrospiraplatensis(Spirolina) • Supplement crew member’s diets • 57% protein by mass and high in several essential vitamins and minerals Megan Heard

  13. Nutrition • Aeroponics for food growth • Aeroponics reduce water usage by 98 percent, fertilizer usage by 60 percent • Up to six crop cycles per year, instead of the traditional one to two crop cycles. Megan Heard

  14. Nutrition • Located in the central hub to take advantage of the lower gravity • 200 m2 will be used to produce food for the entire crew of 12 Megan Heard

  15. Waste Management • In order to be self sustaining, waste products must be used to provide nutrients for agriculture • 3 stages of bacterial decomposition will be used to purify water and compost waste into usable fertilizer Megan Heard

  16. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Travis Ravenscroft

  17. Internal Architecture • Requirements • Provide a habitat for a crew of 12 • 47 m2 floor space per person ( ~ 600 m2 total) • Other considerations • Psychology of habitable area • Coriolis effects • Effects of structural vibration on crew comfort Travis Ravenscroft

  18. Internal Architecture • Inflatable habitat selected based upon launch and manufacturing considerations • Vertical and horizontal designs considered • Horizontal design chosen based upon psychology of area, crew have longer lines of sight Travis Ravenscroft

  19. Internal Architecture • 6 total habitat structures • 2 floors per structure • 820 m2 of useable floor space • 3 used for living space • 1 used for recreation • 1 used for spacecraft control operations • 1 used for medical and science work Travis Ravenscroft

  20. Crew living space • Lower Floor • Kitchen • Bathroom • Upper Floor • Bedrooms • Storage space Travis Ravenscroft

  21. Internal Architecture • Command and Control module • Provides workspace for all personnel • Recreation Pod • Exercise equipment • Sections of upper floor removed • Science and Medical Pod • Provides lab space for scientific experiments • Medical area in case of injury or sickness Travis Ravenscroft

  22. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Brandon Baker

  23. Guidance, Navigation & Control Spacecraft Utilities Navigation Command and Control Attitude Determination and Control Command and Data Computer Operating System Pulsing uplink Optical Nav. Doppler Shift Star maps Linux Windows MAC Fully autonomous High-level cmd, autonomous task completion Tele-robotic operation Sensors Actuators GNC Detail Star Trackers CMGs Momentum Wheels Gyros Thrusters Brandon Baker

  24. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Brandon Baker

  25. Communications UHF antenna and Receiver Waveguide Switches Transponder Control Unit Command Detector Unit High-Gain Medium-Gain Low-Gain Communication Detail Brandon Baker

  26. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Collin Marshall

  27. Propulsion Chemical Ion Nuclear Thermal Rocket • High Thrust • Low Isp • Low Thrust • High Isp • High thrust and Isp • Radiation danger Assemble in LEO VASIMR ENGINE Travel to Earth-Moon L1 Point ΔV 2 km/s Interplanetary Space Travel Thrusters for attitude control Mass: 50,000 kg Cost: $50 mil Collin Marshall

  28. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Ryan Haughey

  29. Power Dynamic Static Solar Nuclear Photovoltaic Fuel Cell Nuclear Power Detail Power Module required: 2 MW Ryan Haughey

  30. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Ryan Haughey

  31. Mission Schedule Phase 1: Module Assembly Structural components launched. Manned missions assemble. Perimeter modules launched into LEO in paired launches Propulsion module launched and assembled Phase 2: Gateway Transit Deceleration Main engine burn to reach Lagrange Point Spin-up commences Phase 3: Crewed Mission Main engine burn to reach destination Engine refuel Direct launch to rendezvous with station Ryan Haughey

  32. Mission Budget Ryan Haughey

  33. Systems Review • Structural Overview • Life Support • Internal Architecture • Guidance, Navigation & Control • Communication • Propulsion • Power Plant • Mission Planning • Design Advantages Ryan Haughey

  34. Design advantages: Innovating the Future through… • Versatility • Livability • Sustainability Ryan Haughey

  35. Questions?

  36. Command and Data Computer Subsystem • Command sequence and programs uplink • Spacecraft clock • Telemetry • Data Storage • Fault Protection and Safing • AACS

  37. Navigation • Navigation data acquisition • Velocity via Doppler shift of coherent downlink • Range via pulsing uplink • Angular momentum via Differenced Doppler • Optical navigation

  38. Spin maintenance Attitude Control • Control Momentum Gyroscopes (CMG) • Single-gimbal • Thrusters • Reaction/momentum wheels Back

  39. Telecommunications Subsystem • High-Gain (HGA), Medium-Gain (MGA) and Low-Gain (LGA) Antennas • Cassegrain arrangement • Transponder (transmitter/receiver with a coherent signal) • Communications Relay • UHF antenna and receiver for surface vehicle contact and relay Back

  40. Power System Solution Regenerative Closed Brayton CycleDiagram Source: Megawatt Class Nuclear Space Power Systems Report - NASA Backup Solar Panels on each pair of modules System Mass: ~40 MT System Mass: ~2.5 MT/pair Back

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