Investigation Of The Effects Of Extravehicular Activity Eva Gloves On Performance
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Investigation of the Effects of Extravehicular Activity EVA Gloves on Performance
Author | : Ram R. Bishu |
Publsiher | : Unknown |
Total Pages | : 56 |
Release | : 1993 |
Genre | : Aeronautics |
ISBN | : NASA:31769000447212 |
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Investigation of the Effects of Extravehicular Activity Eva Gloves on Performance
Author | : National Aeronautics and Space Adm Nasa |
Publsiher | : Independently Published |
Total Pages | : 54 |
Release | : 2018-10-29 |
Genre | : Science |
ISBN | : 1729363350 |
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The objective was to assess the effects of extravehicular activity (EVA) gloves at different pressures on human hand capabilities. A factorial experiment was performed in which three types of EVA gloves were tested at five pressure differentials. The independent variables tested in this experiment were gender, glove type, pressure differential, and glove make. Six subjects participated in an experiment where a number of dexterity measures, namely time to tie a rope, and the time to assemble a nut and bolt were recorded. Tactility was measured through a two point discrimination test. The results indicate that with EVA gloves strength is reduced by nearly 50 percent, there is a considerable reduction in dexterity, performance decrements increase with increasing pressure differential, and some interesting gender glove interactions were observed, some of which may have been due to the extent (or lack of) fit of the glove to the hand. The implications for the designer are discussed. Bishu, Ram R. and Klute, Glenn Johnson Space Center...
Investigation of the Effects of Extra Vehicular Activity Eva and Launch and Entry Les Gloves on Performance
Author | : National Aeronautics and Space Adm Nasa |
Publsiher | : Independently Published |
Total Pages | : 32 |
Release | : 2019 |
Genre | : Electronic Book |
ISBN | : 1792788819 |
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Human capabilities such as dexterity, manipulability, and tactile perception are unique and render the hand as a very versatile, effective and a multipurpose tool. This is especially true for unknown environments such as the EVA environment. In the microgravity environment interfaces, procedures, and activities are too complex, diverse, and defy advance definition. Under these conditions the hand becomes the primary means of locomotion, restraint, and material handling. Facilitation of these activities, with simultaneous protection from the cruel EVA environment are the two, often conflicting, objectives of glove design. The objectives of this study was (1) to assess the effects of EVA gloves at different pressures on human hand capabilities, (2) to devise a protocol for evaluating EVA gloves, (3) to develop force time relations for a number of EVA glove pressure combinations, and (4) to evaluate two types of launch and entry suit gloves. The objectives were achieved through three experiments. The experiments for achieving objectives 1, 2, and 3 were performed in the glove box in building 34. In experiment 1 three types of EVA gloves were tested at five pressure differentials. A number of performance measures were recorded. In experiment 2 the same gloves as in experiment 1 were evaluated in a reduced number of pressure conditions. The performance measure was endurance time. Six subjects participated in both the experiments. In experiment 3 two types of launch and entry suit gloves were evaluated using a paradigm similar to experiment 1. Currently the data is being analyzed. However for this report some summary analyses have been performed. The results indicate that a) With EVA gloves strength is reduced by nearly 50 percent, b) performance decrements increase with increasing pressure differential, c) TMG effects are not consistent across the three gloves tested, d) some interesting gender glove interactions were observed, some of which may have been due to the exte...
Force endurance Capabilities of Extravehicular Activity EVA Gloves at Different Pressure Levels
Author | : Ram R. Bishu |
Publsiher | : Unknown |
Total Pages | : 20 |
Release | : 1993 |
Genre | : Life support systems (Space environment) |
ISBN | : NASA:31769000447394 |
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Extra Vehicular Activity Eva Glove Evaluation Test Protocol
Author | : National Aeronautics and Space Adm Nasa |
Publsiher | : Unknown |
Total Pages | : 160 |
Release | : 2018-11-18 |
Genre | : Electronic Book |
ISBN | : 1731359764 |
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One of the most critical components of a space suit is the gloves, yet gloves have traditionally presented significant design challenges. With continued efforts at glove development, a method for evaluating glove performance is needed. This paper presents a pressure-glove evaluation protocol. A description of this evaluation protocol, and its development is provided. The protocol allows comparison of one glove design to another, or any one design to bare-handed performance. Gloves for higher pressure suits may be evaluated at current and future design pressures to drive out differences in performance due to pressure effects. Using this protocol, gloves may be evaluated during design to drive out design problems and determine areas for improvement, or fully mature designs may be evaluated with respect to mission requirements. Several different test configurations are presented to handle these cases. This protocol was run on a prototype glove. The prototype was evaluated at two operating pressures and in the unpressurized state, with results compared to bare-handed performance. Results and analysis from this test series are provided, as is a description of the configuration used for this test. Hinman-Sweeney, E. M. Marshall Space Flight Center EXTRAVEHICULAR ACTIVITY; GLOVES; HUMAN FACTORS ENGINEERING; PERFORMANCE TESTS; SPACE SUITS; DESIGN ANALYSIS; MISSION PLANNING; PRESSURE EFFECTS...
Advances In Industrial Ergonomics VI
Author | : F Aghazadeh |
Publsiher | : CRC Press |
Total Pages | : 828 |
Release | : 1994-06-02 |
Genre | : Technology & Engineering |
ISBN | : 0748400850 |
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Topics Include: applications of engineering anthropometry, postural strain and discomfort, industrial injury prevention, manual materials handling, and ergonomics of rehabilitation and healthcare systems.
Muscle Strength
Author | : Shrawan Kumar |
Publsiher | : CRC Press |
Total Pages | : 963 |
Release | : 2004-04-27 |
Genre | : Medical |
ISBN | : 9781134202195 |
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Muscle strength is an important topic for ergonomics practitioners and physiologists to understand, especially as it relates to workplace injuries. Muscle strength and function is at the heart of many injuries that lead to reduced productivity and economic strain on the worker, the company, and society as a whole. This comprehensive source o
Biomechanics in Ergonomics
Author | : Shrawan Kumar |
Publsiher | : CRC Press |
Total Pages | : 744 |
Release | : 2007-12-07 |
Genre | : Medical |
ISBN | : 9780849379093 |
Download Biomechanics in Ergonomics Book in PDF, Epub and Kindle
Safety or comfort? Can you truly have one without the other? Is it feasible to have both? Although by no means the only factor, a deep understanding of biomechanics plays a leading role in the design of work and workplaces that are both pain and injury free. Standing firmly on the foundation built by the previous edition, the second edition of Biom