AAE 450 Human Factors Preliminary Design Review Sherri

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AAE 450 – Human Factors Preliminary Design Review Sherri Spreadbury

AAE 450 – Human Factors Preliminary Design Review Sherri Spreadbury

Human Factors Overview z G-Factors z ERV Internal Design z Mars suit

Human Factors Overview z G-Factors z ERV Internal Design z Mars suit

G-Factors z 2 -4% loss of total body calcium z Bone Growth Stimulator: vibrating

G-Factors z 2 -4% loss of total body calcium z Bone Growth Stimulator: vibrating platform at frequencies of 20 -50 Hz. z Sections from sheep femurs showed 20 -percent bone growth after a year of 20 -minute daily sessions on the platform, as compared to the control group

G-Factors z. Mission G-Loads (1) z. Shuttle: 3 g’s z. Apollo: 6 g’s z.

G-Factors z. Mission G-Loads (1) z. Shuttle: 3 g’s z. Apollo: 6 g’s z. Mercury Atlas: 7. 8 g’s z. Mercury Redstone: 11 g’s

G-Factors z Colonel Stapp, 1954: experienced a g-plateau of twenty-five g's and peak force

G-Factors z Colonel Stapp, 1954: experienced a g-plateau of twenty-five g's and peak force of forty g’s z Primates have experienced forces above one hundred g's with only minor injury, and in one case actually lived through a deceleration of almost 250 g's. (2)

G-Factors z Positive Gz Effects. z 1. Grayout z 2. Blackout z 3. Loss

G-Factors z Positive Gz Effects. z 1. Grayout z 2. Blackout z 3. Loss of Consciousness (3)

G-Factors z z z z z Thresholds in Relation to +Gz Tolerance -------------------------------Average Standard

G-Factors z z z z z Thresholds in Relation to +Gz Tolerance -------------------------------Average Standard Symptom Threshold Deviation Range -------------------------------Grayout 4. 1 G ± 0. 7 G 2. 2 to 7. 1 G Blackout 4. 7 G ± 0. 8 G 2. 7 to 7. 8 G Unconsciousness 5. 4 G ± 0. 9 G 3. 0 to 8. 4 G --------------------------------

ERV Design z Crew Living Area: 260 m 3 z 2 -Levels z ht:

ERV Design z Crew Living Area: 260 m 3 z 2 -Levels z ht: 2. 6 m (~8. 5 ft) z dia: 8 m (~26 ft) z 2 -exit areas z 4 -pressurized suits ~100 kg (~220 lb) (4)

Mars suits z 4 -6 suits z. Weight: under 220 lb (weigh 85 lb

Mars suits z 4 -6 suits z. Weight: under 220 lb (weigh 85 lb on Mars) z. Pressure z. Insulation z. Power: rechargeable batteries needed? z. Maneuverability z. Rescue mission

Future Work z ERV Design: better layout, both levels z Mars suit: mass, cost

Future Work z ERV Design: better layout, both levels z Mars suit: mass, cost efficiency

References z (1)History of Manned Spaceflight, David Baker, Ph. D z (2) History of

References z (1)History of Manned Spaceflight, David Baker, Ph. D z (2) History of Research in Space Biology and Biodynamics http: //www. hq. nasa. gov/office/pao/History/afspbio/contents. htm z (3) A Hazard In Aerobatics: Effects Of G-forces On Pilots http: //avstop. com/AC/AC 91 -61. html z (4) G-Factors & Weightlessness http: //getty. net/texts/spacemed. txt

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