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Human Factors: Critical Design Review

This comprehensive review covers the human factors, critical design, and system requirements of the MarsSuit, emphasizing mission, physical, and system requirements alongside necessary equipment for Mars exploration. The MarsSuit includes features like tear, dust, and puncture protection, temperature and pressure regulation, oxygen supply, waste removal, humidity control, and radiation protection. It also incorporates medical equipment, necessary tools like regenerators and battery rechargers, communication systems, and contaminant control mechanisms. The MarsSuit's key specifications, price development, risk analysis, and references for further study are detailed in this analysis.

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Human Factors: Critical Design Review

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  1. Human Factors: Critical Design Review ERV Design/Marssuit Sherri Spreadbury March 6, 2001

  2. Cylinder 6m height 8m diameter Total Volume: 301 m3 2 Floors Storm Shelter: 50 m3 Control Equipment: 30 m3 Water: 2.67 m3 Food: 4.67 m3 Crew Quarters: 70 m3 Living Room: 30 m3 Kitchen: 20 m3 Exercise: 30 m3 Structure: 50.27 m3 Storage:10 m3 ERV Design

  3. Marssuit • Mission Requirements • Physical Requirements • System Requirements • Necessary Equipment

  4. Marssuit-Mission Requirements • Maintenenance • HAB, ERV, rover, nuclear power plant, etc. • Construction • gardening dome, etc. • Geology/Exobiology • Use of ruler, Breton compass, rock hammer, sample bags, climbing bending, etc. • Other Mars Science

  5. Heated Gloves Increased sensitivity for tool usage. Arms/Legs Targeted walking speed 15 min mile (6.4 km/hr). Protection against puncture. Joints Increased maneuverability. Hard Upper Torso (HUT) Needed for suit attachments. Electronic checklist Can store data for various missions. Marssuit-Physical Requirements

  6. Display and Controls Module Used to adjust life support systems. Life Support System Carry oxygen, power, and pressure system. Secondary Oxygen Pack 30 min emergency backup. Advanced Battery 10 hr worth of power (for an 8 hr EVA day). Rechargable 8 times. Marssuit-Physical Requirements

  7. Temperature Regulation Sublimation sys. will not work on Mars (pressure and temperature too high). Pressure Regulation Gas pressure system 34.47 kPa (5 psia) Oxygen Supply Regulate pure oxygen atmosphere. Waste Removal Metabolic Thermal loads carries away from body. Humidity Control Toxic Maximum absorption garment (MAG) Marssuit-System Requirements

  8. Tear, Dust, and Puncture Protection Soil angular and abrasive Strong winds Outer material dust resistant Radiation Protection Multilayer insulation Water and Food In-suit drink bag (ISU holds 1 liter of water). Side holder for protein bar. Communication Constant comm. with rover or HAB. Marssuit-System Requirements

  9. Contaminant control Protect Mars samples from contamination Reduce suit leakage rates (100cc per min leakage through suit joints). Medical Equipment Medical repair integrated into suit Permanent IV to keep blood sugar levels optimized, prevent dehydration and monitor redblood cell count Marssuit-System Requirements

  10. Necessary Equipment • Regenerator & Canister • For metal oxide regenerable CO2 removal • Battery Recharger • Multiple Batteries • Replaceable parts

  11. Mass of suit: 45kg Volume:0.9557 m3 (33.75 ft3) Length 0.9144m (3ft) Width 0.4572m (1.5ft) Height 2.286m (7.5ft) Number of suits: 6 Mass of Parts: 100kg Total Mass: 370kg Price Development: $180 Million Risk Analysis: No critical failures Lots of testing Backup systems Marssuit Final Analysis

  12. References • U.S. Space Gear, Outfitting the Astronaut, Lillian Kozloski, Smithsonian Institute Press, 1994. • From Imagination to Reality: Mars Exploration Studies of the Journal of the British Interplanetary Society, edited by Robert Zubrin, American Astronauical Society, Volume 91 – Science and Technology series, 1997. • Hamilton Sundstrand – http://www.hsssi.com/Applications/SpaceSuits • Suited for Spacewalking – http://spacelink.nasa.gov/Instr.PDF

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