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Emergency Mask (EM). Integrating MBSE Into Ongoing Projects: Requirements Validation and Test Planning for ISS SAFER, AIAA Annual Technical Symposium, May 18, 2012, G. Pierce/T. Williams. Emergency Mask. EM Design is based on heritage mask already in service with DoD …

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Emergency Mask (EM)

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Emergency mask em

Emergency Mask (EM)

Integrating MBSE Into Ongoing Projects: Requirements Validation and Test Planning for ISS SAFER, AIAA Annual Technical Symposium, May 18, 2012, G. Pierce/T. Williams


Emergency mask

Emergency Mask

EM Design is based on heritage mask already in service with DoD…

with a change in hood material to improve flammability resistance and permeation resistance, but…

Gore hood

  • One size fits all

  • Seals at the neck

  • Dual bayonet connectors accommodate either:

    • Two Fire Cartridges

    • Two 3M Ammonia Cartridges

  • Hardware Overview

Visor

Adjustable head strap

Butyl Rubber Neckdam

Inhalation port (2x) w/ keyed bayonet fittings

The hood material touches almost every interface in the mask

Exhalation port

Emergency Mask without Cartridges (Front)

Emergency Mask with Fire Cartridges

(Side)


Qualification acceptance tests performed

Qualification/Acceptance Tests Performed

Prototype testing covered every high risk test planned for qualification testing…

Fabrication

WSTF A

Visor/Gasket Leak

Inhale/Exhale Valve Test

Leakage Test (Water)

Leakage Test (Salt)

Neckdam Stretch Test

PDA/PIA

WSTF B

Molten Drip

After Flame

Thermal Cycle

Don/Doff Cycle Test

(7 cycles)

Qual1

Salt

Water

Neckdam

Salt

Water

Neckdam

Salt

Water

Neckdam

Key:

WSTF C

Molten Drip

After Flame

Thermal Cycle

Don/Doff Cycle Test

(7 cycles)

Ammonia Permeability

Salt

Water

Neckdam

Salt

Water

Neckdam

Salt

Water

Neckdam

Qual2

Molten Drip

After Flame

Thermal Cycle

Don/Doff Cycle Test

(7 cycles)

Salt

Water

Neckdam

Salt

Water

Neckdam

Water

Salt

Neckdam

Qual3

Post-test evaluation was digital, rather than analog

Thermal Cycle

Don/Doff Cycle Test

(7 cycles)

Salt

Water

Neckdam

Qual4

JSC Activity

Cartridge Cantilever Pull

Hood Strap Pull

Thermal Cycle

Don/Doff Cycle Test

(28 cycles)

Cartridge Axial Pull

Cartridge Torque

Protection Factor

Demos

Salt

Water

Neckdam

Salt

Water

Salt

Water

Salt

Water

Neckdam

Salt

Water

Salt

Water

Qual5

Gentex Activity

WSTF Activity

Depress/

Repress

Inhalation Resistance

Field of Vision

Exhalation Resistance

CO2 Buildup

Functional Tests

(as required)

Qual6

Outside Vendor

Neckdam Stretch

Leakage Test (Water)

Leakage Test (Salt)

Possibly

Destructive


Lessons summary

Lessons/Summary


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