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Related Experiment Videos

EVA safety design guidelines.

P Tremblay1

  • 1United Technologies Corp., Hamilton Standard Division, Windsor Locks, Conn., USA.

Acta Astronautica
|January 1, 1994
PubMed
Summary
This summary is machine-generated.

Space suits, or Extravehicular Mobility Units, protect astronauts. Most hardware failures during spacewalks (EVA) risk mission abort and compromise crew safety, necessitating enhanced reliability and hazard mitigation.

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Area of Science:

  • Space Engineering
  • Astronaut Safety
  • Reliability Engineering

Background:

  • The Extravehicular Mobility Unit (EMU) is a critical life support system, functioning as a self-contained environment for astronauts during spacewalks.
  • A significant percentage of potential hardware failures during Extravehicular Activity (EVA) can lead to mission aborts.
  • Over half of these failure modes directly impact critical life support functions, posing a substantial risk to astronaut safety.

Purpose of the Study:

  • To identify and analyze potential hazards that can compromise astronaut safety during EVA.
  • To explore approaches for enhancing the reliability of spaceflight equipment.
  • To investigate methods for improving overall astronaut safety during spacewalks.

Main Methods:

  • Analysis of historical Extravehicular Activity (EVA) data to identify common hardware failure modes.

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  • Review of in-flight servicing procedures and equipment interfacing protocols.
  • Assessment of potential risks associated with human factors and operational procedures during EVA.

    • Main Results:

    • Eighty-four percent of potential hardware failures during EVA necessitate mission abort.
    • Fifty-two percent of identified failure modes compromise critical life support functions.
    • Hazards extend beyond hardware failures to include risks from servicing and equipment interaction.

    Conclusions:

    • Enhancing equipment reliability is paramount for mitigating risks during EVA.
    • Addressing hazards from in-flight servicing and interfacing equipment is crucial for astronaut safety.
    • A comprehensive approach is needed to ensure astronaut safety throughout Extravehicular Activity.