Ergonomic design of extravehicular activity electrical connectors for the spacesuit gloved hand /
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1989.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | The following dissertation describes an investigation of a basic, yet critical, element of current spacecraft design, the electrical connector; particularly, connectors to be used by the extravehicular activity (EVA) astronaut. If not designed or chosen correctly, mission success may be hampered, mission cost may rise, and crewmembers may be exposed to unnecessary hazards. Thirty five circular electrical connectors (seven types, five sizes per type), able to be qualified for spaceflight, were evaluated for EVA applicability according to their effect on performance time, heart rate, subjective ratings of visual cues, tactile cues, general operation, and discomfort, and overall connector preference. Connectors varied by external geometry, surface texture, markings, and operating characteristics. The study employed the use of a glove-box which simulated the vacuum environment of space. Twelve male participants donned extravehicular mobility unit (spacesuit) gloves and operated the connectors within the glove-box. A variety of design recommendations for surface geometry, visual markings, and tactile feedback were established based on the significant effect of connector type and connector diameter on operation and usefulness of the connectors and their individual traits. Although no one connector type tested satisfied all recommendations, three connectors, G&H Small Wing, G&H Medium Wing, and G&H Long Ring, were found to be most satisfactory for EVA use. The time required to lock and unlock these connectors ranged from 5.06 to 7.40 sec and 3.02 sec to 4.10 sec, respectively. Other connectors exceeded these times by as much as 137.2% (e.g. 24.99 sec). The outcome of the objective measures (time, heart rate) coordinated well with subjective ratings and rankings results.. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Industrial Engineering." |
| Physical Description: | xviii, 253 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |