ERV Team 2 Final Report

1
ERV Team 2 Final Report

• Alicia Cole-Quigley
• James Gilson
• Erin Hammond
• Domenic Marcello
• Matt Miller
• Jeff Rosenberger

2
ERV Team 2 Final Report

• Alicia Cole-Quigley
• James Gilson
• Erin Hammond
• Domenic Marcello
• Matt Miller
• Jeff Rosenberger

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Mission Overview

• Send uncrewed Earth Return Vehicle (ERV) and
  In-Situ Resource Utilization (ISRU) Plant to Mars
• 26 months later, send crewed transport with 4
  crewmembers and supplies
• Crew spends 550 days on Martian surface and
  conducts scientific experiments
• Crew returns to Earth in ERV

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Primary Objective

• The safe transport and return of the human crew
  for the duration of the defined mission.

http//floridalawfirm.com/mars.jpg
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Secondary Objectives

• the investigation of extended duration human
  spaceflight
• the efficient conversion of Martian atmosphere
  and resources to support mission objectives
• the investigation of psychological effects of
  such a mission on the crew

• successful return of experimental data regarding
  Mars and prolonged human exposure to low gravity
• the promotion of global unity through exploration
  of the solar system and beyond
• the ability to provide extra resources (10 more
  propellant than needed) for a Mars Rover

6
Launch Vehicle Interface

• Inline core vehicle with two attached Shuttle
  boosters
• Payload is aft mounted on expendable core vehicle
• One-third launch costs of Titan IV with 5x the
  payload capability

http//www.space.com/images/h_magnum_03.jpg
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Navigation/Attitude Control

• 4 Control Moment Gyros (CMGs)
• Cold gas thrusters as failsafe for CMGs
• 3 Ball CT-633 Stellar Attitude Sensors
• 2 TNO Sun Acquisition Sensors
• 6 Honeywell QA3000 Accelerometers

http//centauri.larc.nasa.gov/issvc97/cmg.gif
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Propulsion

• 3 RD-192 Methane Engines
• Liquid Methane/Liquid Oxygen
• Designed by Glushko
• Produces 2138 kN of thrust
• Isp of 356s
• Gimbaling capability 8 in 2 planes

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Structure

• Banana split configuration
• 3 floors
• Private areas
• Scientific experiments
• Common areas

http//spaceflight.nasa.gov/gallery/images/mars/ma
rsbases/lores/s97_07837.jpg
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Crew Accommodations Human Factors

• Crew composition 2 male, 2 female
• More private space than currently on ISS
• Rear entry climb in EVA suits
• ISS Fire Detection System
• Solid Amine CO2 scrubbers

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Command, Control, Communications

• MOCC, SOCC, and POCC at NASA Johnson Space Center
  in Houston, Texas
• 2 LM RAD-6000 computers
• 2-way sound, video, text, and data capability
• Low-gain antenna just after launch and into LEO
• High-gain antenna using Deep Space Network for
  mission duration

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Entry/Descent - Mars

• Orbital maneuvering system (OMS) and aerobraking
  for entry into Martian orbit
• Establish stable orbit
• Fire retrorockets to descend
• Combination parachute and retrorocket for landing

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Landing Site on Mars

• Daedalia Planum
• Consists of old lava flows
• 25 South latitude 127.5 West longitude
• Good location in terms of both wind and solar
  power

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Entry/Descent/Landing - Earth

• OMS and aerobraking to enter low Earth orbit
• Establish stability in LEO
• Await taxi to return crew to Earths surface

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Thermal Protection

• Inconel 617
• Density of 8.36 g/cm3
• Doubles as structural shell
• Used and tested on X-33
• Panels are easy to repair or replace

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Power

• SP100 Nuclear Reactor
• Wind turbines (Lakota SC)
• Exercise equipment
• ISRU Technologies
• Sabatier Process
• Reverse Water Gas Shift
• Electrolysis

http//www.truenorthpower.com/products_turbines.ht
m
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Future Work

• Finish sensor trade study
• Continue research on RD-192
• Develop appropriate radiation shielding system
  for ERV
• Investigate reentry dynamics
• Study high energy transfer orbits

• Calculate crew food, water, and fresh air
  requirements
• Research Inconel manufacturing
• Detailed numerical analysis of power subsystem
• Landing Banana Split

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Any questions?