Anthropometrics - UMD...Anthropometrics ENAE 697 - Space Human Factors and Life Support U N I V E R...

Anthropometrics ENAE 697 - Space Human Factors and Life Support

U N I V E R S I T Y O FMARYLAND

Anthropometrics• Terminology• Reach Envelopes• Body Segment Parameters• Strength and Force Capabilities• Design Parameters

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© 2019 David L. Akin - All rights reserved http://spacecraft.ssl.umd.edu

http://spacecraft.ssl.umd.edu



Body Reference Frames

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Major Components of Skeletal System

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Anatomical Landmarks

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Body Segmentation Planes

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Seated Grasp Reach Limits (XY Plane)

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Seated Grasp Limits (-15 cm)

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Seated Grasp Limits (-61 cm)

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Seated Grasp Limits (XZ Plane)

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Seated Grasp Limits (30 cm XZ Plane)

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Seated Grasp Limits (YZ Plane)

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Seated Grasp Limits (0 cm - YZ Plane)

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Microgravity Reach Envelope• 95%ile

male: 195 cm

• 5%ile female: 150 cm

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Zero-G Foot Restraint Reach Envelope

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Lateral µg Foot Restraint Reach Envelope

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4g Strike Distance w/ Shoulder Harness

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95%ile American Male



4g Strike Distance w/ Lap Belt Only

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95%ile American Male



µg Neutral Body Posture

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µg Neutral Body Posture

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Body Joint Range of Motion

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Whole Body Masses

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American Male Japanese Female

5th Percentile 65.8 kg 145.1 lb

41.0 kg 90.4 lb


51.5 kg 113.5 lb


61.7 kg 136.0 lb



Body Segment Mass Parameters

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5th %ile 50th %ile 95th %ile1 4260 4400 45502 930 1100 12703 20420 26110 317604 2030 2500 29605 9420 12300 151506 1600 2500 25007 1180 1450 17208 460 530 6109 2890 3640 438010 5480 6700 792011 3320 4040 476012 840 1010 1180

3+4+5 31870 40910 498709+10 8360 10340 123007+8 1640 1980 2320



Ballasted Partial Gravity Simulation

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Ballasting for UW Planetary Simulation

Body Segment Lunar Ballast Mars Ballast

Torso/Head 12.1 28.5

Upper Arm (each) 0.7 1.5

Lower Arm (each) 0.5 1.3

Thigh (each) 3.4 8.1

Lower Leg (each) 1.4 3.2

Totals 24 57

IVA Simulation assuming 150 lb test subject

All ballast weights in pounds

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Sample Strength Measurements

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Pushoff Loads (95%ile Male)

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Force (N/lb) Time for 0.3m pushoff (sec)

Push velocity (m/sec)

Time for 0.6m pushoff (sec)

Push velocity (m/sec)

4.45/1 3.66 0.16 5.18 0.23

22.3/5 1.64 0.37 2.31 0.52

44.5/10 1.16 0.52 1.64 0.73

89/20 0.82 0.73 1.16 1.04



Grip Strength vs. Grip Size

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Comparison of Male and Female Strength

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Leg Strength vs. Pose

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Static µg Body Envelope (95%ile Male)

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µg Transport Corridors

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µg Passageway Minimum Requirements

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µg Access in Working Passageways

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RASC-AL May 18-21, 2003 - Page

SCO

UT

University of Maryland Space Systems Design

Space Construction & Orbital Utility Transport• Proposed element of the

Orbital Aggregation & Space Infrastructure Systems (OASIS) program

• Designed to operate with proposed Gateway Station at the Earth-Moon L1 Point

• Closed-cabin atmospheric system for EVA

• SCOUT System:

RASC-AL May 18-21, 2003 - Page

SCO

UT

University of Maryland Space Systems Design

Internal Volume Constraints• Major volume requirements

designed into the cabin layout

– Minimal volume required to accommodate a 95% American male

• 0.72m x 0.71m x 0.172m • Internal components placed around

this volume

– Minimal volume required for a controlled tumble

• Sphere with 1.22m diameter



Calculation of Field of View

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Design to Prevent Edge Hazards

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Design to Prevent Corner Hazards

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Anthropometrics - UMD...Anthropometrics ENAE 697 - Space Human Factors and Life Support U N I V E R...

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