Download or read book Understanding Skill in Eva Mass Handling Volume 4 An Integrated Methodology for Evaluating Space Suit Mobility and Stability written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-12 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The empirical investigation of extravehicular activity (EVA) mass handling conducted on NASA's Precision Air-Bearing Floor led to a Phase I SBIR from JSC. The purpose of the SBIR was to design an innovative system for evaluating space suit mobility and stability in conditions that simulate EVA on the surface of the Moon or Mars. The approach we used to satisfy the Phase I objectives was based on a structured methodology for the development of human-systems technology. Accordingly the project was broken down into a number of tasks and subtasks. In sequence, the major tasks were: 1) Identify missions and tasks that will involve EVA and resulting mobility requirements in the near and long term; 2) Assess possible methods for evaluating mobility of space suits during field-based EVA tests; 3) Identify requirements for behavioral evaluation by interacting with NASA stakeholders;.4) Identify necessary and sufficient technology for implementation of a mobility evaluation system; and 5) Prioritize and select technology solutions. The work conducted in these tasks is described in this final volume of the series on EVA mass handling. While prior volumes in the series focus on novel data-analytic techniques, this volume addresses technology that is necessary for minimally intrusive data collection and near-real-time data analysis and display.McDonald, P. Vernon and Newman, DavaJohnson Space CenterDATA ACQUISITION; REAL TIME OPERATION; EXTRAVEHICULAR ACTIVITY; FIELD TESTS; SPACE SUITS; STABILITY; MOON; GAS BEARINGS
Download or read book Understanding Skill in EVA Mass Handling written by P. Vernon McDonald and published by . This book was released on 1999 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The empirical investigation of extravehicular activity (EVA) mass handling conducted on NASA's Precision Air-Bearing Floor led to a Phase I SBIR from JSC. The purpose of the SBIR was to design an innovative system for evaluating space suit mobility and stability in conditions that simulate EVA on the surface of the Moon or Mars. The approach used to satisfy the Phase I objectives was based on a structured methodology for the development of human-systems technology. Accordingly the project was broken down into a number of tasks and subtasks. In sequence, the major tasks were: (1) identify missions ans tasks that will involve EVA and resultingly mobility requirements in the near and long term; (2) assess possible methods for evaluating mobility of space suits during field-based EVA tests; (3) identify requirements for behaviorial evaluation by interacting with NASA stakeholders; (4) identify necessary and sufficient technology for implementation of a mobility evaluation system; (5) prioritize and select technology solutions. The work conducted in these tasks is described in this final volume of the series on EVA mass handling. While prior volumes in the series focus on novel data-analytic techniques, this volume addresses technology that is necessary for minimally intrusive data collection and near-real-time data analysis and display.
Download or read book Understanding Skill in EVA Mass Handling written by and published by . This book was released on 1999 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in EVA Mass Handling written by Gary E. Riccio and published by . This book was released on 1997 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in Eva Mass Handling Volume 1 Theoretical and Operational Foundations written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-15 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the theoretical and operational foundations for our analysis of skill in extravehicular mass handling. A review of our research on postural control, human-environment interactions, and exploratory behavior in skill acquisition is used to motivate our analysis. This scientific material is presented within the context of operationally valid issues concerning extravehicular mass handling. We describe the development of meaningful empirical measures that are relevant to a special class of nested control systems: manual interactions between an individual and the substantial environment. These measures are incorporated into a unique empirical protocol implemented on NASA's principal mass handling simulator, the precision air-bearing floor, in order to evaluate skill in extravehicular mass handling. We discuss the components of such skill with reference to the relationship between postural configuration and controllability of an orbital replacement unit, the relationship between orbital replacement unit control and postural stability, the relationship between antecedent and consequent movements of an orbital replacement unit, and the relationship between antecedent and consequent postural movements. Finally, we describe our expectations regarding the operational relevance of the empirical results as it pertains to extravehicular activity tools, training, monitoring, and planning. Riccio, Gary and McDonald, Vernon and Peters, Brian and Layne, Charles and Bloomberg, Jacob Johnson Space Center RTOP 199-16-11-48...
Download or read book Understanding Skill in Eva Mass Handling Volume 3 Empirical Developments and Conclusions written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-15 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Key attributes of skilled mass handling were identified through an examination of lessons learned by the extravehicular activity operational community. These qualities were translated into measurable quantities. The operational validity of the ground-based investigation was improved by building a device that increased the degrees of freedom of extravehicular mobility unit motion on the Precision Air-Bearing Floor. The results revealed subtle patterns of interaction between motions of an orbital replacement unit mockup and mass handler that should be important for effective performance on orbit. The investigation also demonstrated that such patterns can be measured with a variety of common instruments and under imperfect conditions of observation. Riccio, Gary E. and McDonald, P. Vernon Johnson Space Center RTOP 199-16-11-48...
Download or read book Understanding Skill in EVA Mass Handling written by and published by . This book was released on 1998 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in Eva Mass Handling Volume 2 Empirical Investigation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-15 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report we describe the details of our empirical protocol effort investigating skill in extravehicular mass handling using NASA's principal mass handling simulator, the precision air bearing floor. Contents of this report include a description of the necessary modifications to the mass handling simulator; choice of task, and the description of an operationally relevant protocol. Our independent variables are presented in the context of the specific operational issues they were designed to simulate. The explanation of our dependent variables focuses on the specific data processing procedures used to transform data from common laboratory instruments into measures that are relevant to a special class of nested control systems (discussed in Volume 1): manual interactions between an individual and the substantial environment. The data reduction is explained in the context of the theoretical foundation described in Volume 1. Finally as a preface to the presentation of the empirical data in Volume 3 of this report series, a set of detailed hypotheses is presented. Riccio, Gary and McDonald, Vernon and Peters, Brian and Layne, Charles and Bloomberg, Jacob Johnson Space Center RTOP 199-16-11-48...
Download or read book Understanding Skill in EVA Mass Handling written by and published by . This book was released on 1997 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in EVA Mass Handling written by P.Vernon McDonald and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in EVA Mass Handling written by Gary E. Riccio and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Skill in EVA Mass Handling written by Gary E. Riccio and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Space Suit Mobility with Applications to EVA Operations written by Patricia Barrett Schmidt and published by . This book was released on 2001 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) The experimental data corresponds closely with the membrane model, implying that space suit joint stiffness is primarily determined by volume changes as the joint bends and the resulting compression of the gas inside the space suit. The space suit models were applied in a computational work envelope analysis to determine the volume in which a space-suited astronaut can comfortably work. A new method that uses inverse kinematics and the space suit model to calculate a work envelope based on visibility constraints and human strength limits is developed. Sensitivity analysis of the work envelope indicates that improving shoulder mobility and upward and downward visibility enlarge the space-suited work envelope.
Download or read book A Method of Evaluating Efficiency During Space suited Work in a Neutral Buoyancy Environment written by and published by . This book was released on 1991 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Understanding Human space Suit Interaction to Prevent Injury During Extravehicular Activity written by Allison Paige Anderson and published by . This book was released on 2014 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extravehicular Activity (EVA) is a critical component of human spaceflight. Working in gas-pressurized space suits, however, causes fatigue, unnecessary energy expenditure, and injury. The problem of injury is particularly acute and is exacerbated with the additional hours astronauts spend training inside the suit, especially underwater in NASA's Neutral Buoyancy Laboratory (NBL). Although space suit performance and improved system designs have been investigated, relatively little is known about how the astronaut moves and interacts with the space suit, what factors lead to injury, and how to prevent injury. At the outset of this research effort there were no technologies suitable to evaluate human movement and contact within the space suit during dynamic movements. The objective of this thesis is to help understand human-space suit interaction and design hardware to assess and ultimately mitigate injury. This is accomplished through two specific aims. The first specific aim is to use data mining techniques to uncover trends in space suit configuration, training environment, and anthropometry, which may lead to injury. Two groups of subjects were analyzed: those whose reported shoulder injury incidence is specifically attributable to the NBL or working in the space suit, and those whose shoulder problems began in active duty, meaning working in the suit could have been a contributing factor. The first statistical model correctly identifies 39% of injured subjects, while the second model correctly identifies 68% of injured subjects. For both models, percent of training incidence in the space suit planar hard upper torso (HUT) was the most important predictor variable. Frequency of training and recovery between training were also identified as significant metrics. These variables can be monitored and modified operationally to reduce the impacts on the astronaut's health. Several anthropometric dimensions were also found to have explanatory power for injury. Expanded chest depth was included in both models, while bi-deltoid breadth was relevant for identifying injured NBL subjects and shoulder circumference was relevant for identifying injured Active subjects. These dimensions may be targeted as particularly important to accommodate in future designs of the HUT or any advanced concept space suits. Finally, for the NBL subjects, previous record of injury was found to be an important factor. Further descriptive analysis implies that analyzing the HUT style and size together may be critical for future detailed studies on fit and accommodation. These results quantitatively elucidate the underlying mechanisms of shoulder injuries for astronauts working inside the space suit. The second specific aim is to develop a wearable pressure sensing capability to quantitatively measure areas on the body's surface that the space suit impacts during normal EVA movement. A low-pressure sensing system was designed and constructed for the upper body during dynamic movements inside the space suit environment. Sensors were designed to measure between 5-60 kPa with approximately 1 kPa resolution. The sensors are constructed from hyper-elastic silicone imbedded with a microfluidic channel. The channel is filled with liquid conductive metal, galinstan, such that an applied pressure corresponds to a change in resistance of the liquid metal. The system of 12 pressure sensors accommodates anthropometry from a 50th percentile female to a 95th percentile male upper body dimensions with near shirt-sleeve mobility. The wiring was intentionally designed to achieve the best trade between flexibility, resistance, and stretch ability, but ultimately was the greatest limitation in system durability. The electronics architecture utilizes onboard data storage with more than 4 hours of use. The entire system was designed with extreme environments in mind, where considerations of shock, battery hazards, and material properties in mixed gas, pressurized atmosphere were minimized to ensure user safety. The pressure sensing system was used in a human subject experiment to characterize human-suit interaction. Three experienced subjects were asked to perform a series of 3 isolated joint movements and 2 functional tasks, all focused on upper body movement. Movements were repeated 12 times each and pressure responses were evaluated both by quantifying peak pressure and full profile responses. Comparing subjective feedback to the quantitative pressure data allows a sense of the variability of movement and minor changes in loading on the body while performing suited motions. Users generally felt they were consistent for all movements. However, using a nonparametric H-test, 53% of movements were found to be biomechanically inconsistent (p
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1987 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Health and Performance Risks of Space Exploration Missions written by Jancy C. McPhee and published by U. S. National Aeronautics & Space Administration. This book was released on 2009 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
