Download or read book Development of a Prototype Movement Assistance System for Extravehicular Activity Gloves written by Tyler Nathaniel Hill and published by . This book was released on 2015 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Innovative Hand Exoskeleton Design for Extravehicular Activities in Space written by Pierluigi Freni and published by Springer. This book was released on 2014-06-23 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental conditions and pressurized spacesuits expose astronauts to problems of fatigue during lengthy extravehicular activities, with adverse impacts especially on the dexterity, force and endurance of the hands and arms. A state-of-the-art exploration in the field of hand exoskeletons revealed that available products are unsuitable for space applications because of their bulkiness and mass. This book proposes a novel approach to the development of hand exoskeletons, based on an innovative soft robotics concept that relies on the exploitation of electroactive polymers operating as sensors and actuators, on a combination of electromyography and mechanomyography for detection of the user’s will and on neural networks for control. The result is a design that should enhance astronauts’ performance during extravehicular activities. In summary, the advantages of the described approach are a low-weight, high-flexibility exoskeleton that allows for dexterity and compliance with the user’s will.
Download or read book Design and Development of a Jointless Assistive Glove written by Che-Ming Chang and published by . This book was released on 2016 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: A jointless glove based assistive prototype was designed to assist people with limited hand muscle strength associated with ageing and enhanced gripping abilities for daily activities. As an exploration into adaptive concepts in assistive technology, the prototype was developed with the benefits of both jointless and exoskeleton concepts. While jointless gloves provides a simple, compact and versatile base of which actuating mechanisms could act upon, the exoskeleton approach provided stability and more precise actuation. The proposed adapted jointless glove design allowed free and unhindered user motion when unassisted. It also provides instantaneous assistive forces to the fingertip when required, regardless of the hand positions. The prototype provides assistance for finger flexion and extension by a pulley system with side and dorsal routed cable on the finger. A dorsal palm mounted actuation unit provides linear motion and houses the electronics. The linear electrical actuator was designed to be connected to other moving parts via a disc clutching mechanism to provide isolated actuation to the fingertip while restricting rotation about the metacarpophalangeal joint. A crank slider mechanism limits the rotation by a semi-circular harness mounted on the proximal segment of the finger while the pulley system actuated the fingertip. The prototype was constructed by components made of laser-cut acrylics, 3D printed parts and commercially available electronics. Using an adapted jointless approach with exoskeletal harness, the prototype was lightweight, portable and versatile while being unrestrictive in user experience. The devised prototype was mathematically modelled and the results were compared for analyse. The end results validated the model and provided explanations to the partial variations observed in the results. The end results showed that the device was able to achieve a maximum fingertip force of 11N. However, the model suggested a higher resultant force where the inaccuracy of the manufactured parts and loss of forces caused by warping and friction contributed to the lowered result. The devised jointless glove prototype was able to strengthen the human hand where traditional factors such as wrist motions and restrictive user experience were minimized.
Download or read book Space Station Systems written by and published by . This book was released on 1987 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Glove Exoskeleton for Extra vehicular Activities written by Alain Favetto and published by . This book was released on 2014* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Space Station Systems written by and published by . This book was released on 1989 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Spacesuits written by Kenneth S. Thomas and published by Springer Science & Business Media. This book was released on 2011-11-23 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spacesuits are far more than garments. They are a personalized spacecraft that allows direct contact and interaction with everything beyond our world, and a last refuge for survival in a disaster. Creating safe, reliable, and comfortable spacesuits is an ongoing challenge that has spanned over four decades. "U. S. Spacesuits, 2nd Edition" by Kenneth S. Thomas and Harold J. McMann details the technical evolution of U. S. spacesuits from their roots in high altitude aviation and vacuum tube development to present day, with an additional look into the future. This primary source of spacesuit information explains the functions, historical development, and use of spacesuits from a worldwide perspective. In this new edition, the authors update the story of U.S. spacesuit development and efforts, from the design challenges modern engineers face to the latest roles of spacesuits in space exploration. The book also provides a close up look at NASA's new Constellation Space Suit System as well as Apollo prototype configurations that have been discovered since 2005. Also not in the earlier edition is a prototype and model of the Gemini pressure suit and an explanation of its development. Finally, there are new insights into the suits used for the Gemini, Apollo, Skylab, Space Shuttle, and International Space Station missions.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1991 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Unpowered Exoskeleton to Reduce Astronaut Hand Fatigue During Microgravity EVA written by Alan John Carey and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Astronaut hand fatigue during Extravehicular Activity (EVA) and EVA training is a critical risk in human space exploration. Improved glove designs over the past forty years have reduced hand fatigue, but limitations of the technology prevent major improvements to reduce hand fatigue. Therefore, a mechanism to assist astronauts by reducing hand fatigue was explored. Many organizations have already developed exoskeletons to assist astronauts, but all mechanisms developed required electrically powered actuators and control systems to enhance grip strength. However, astronauts already possess the strength required to actuate the glove; what is needed is a method to reduce fatigue without introducing electromechanical complexity. A passive mechanical system was developed as a proof-of-concept to test the feasibility of an unpowered exoskeleton to maintain static grip around an object. The semi- rigid nature of an inflated pressure glove provided an ideal substrate to mount a mechanism and associated components to allow an astronaut to release his/her grip inside the glove while maintaining attitude, as the mechanism will keep the glove closed around an object.Three prototypes were fabricated and tested to evaluate the architecture. The final two prototypes were tested on a real pressure suit glove at Final Frontier Design (FFD), and the third mechanism demonstrated attachment and basic operating principles. At University of California (UC) Davis, pressure glove analogs were fabricated from a baseball batting glove and polystyrene to simulate a real pressure glove without the risk of testing in a reduced pressure environment (i.e. a glove box). Testing of the third prototype showed a reduction in fatigue as measured by Maximum Voluntary Contraction (MVC) grip force over a 30 second period when the mechanism assisted gripping an object.
Download or read book Large Space Structures Systems in the Space Station Era written by and published by . This book was released on 1993 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1989 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace Medicine and Biology written by and published by . This book was released on 1991 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1962 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book US Spacesuits written by Kenneth S. Thomas and published by Springer Science & Business Media. This book was released on 2007-09-11 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: * the most accurate and comprehensive work on U.S. spacesuits ever published. *A unique insight into the development of US spacesuits through to the present day. * Presents in context the authors’ unique collection of 172 black and white photographs. * Explains why spacesuits are a last refuge for astronauts for survival. * Details many technically and historically interesting developments, but which never achieved fruition.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wearable Robots written by José L. Pons and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wearable robot is a mechatronic system that is designed around the shape and function of the human body, with segments and joints corresponding to those of the person it is externally coupled with. Teleoperation and power amplification were the first applications, but after recent technological advances the range of application fields has widened. Increasing recognition from the scientific community means that this technology is now employed in telemanipulation, man-amplification, neuromotor control research and rehabilitation, and to assist with impaired human motor control. Logical in structure and original in its global orientation, this volume gives a full overview of wearable robotics, providing the reader with a complete understanding of the key applications and technologies suitable for its development. The main topics are demonstrated through two detailed case studies; one on a lower limb active orthosis for a human leg, and one on a wearable robot that suppresses upper limb tremor. These examples highlight the difficulties and potentialities in this area of technology, illustrating how design decisions should be made based on these. As well as discussing the cognitive interaction between human and robot, this comprehensive text also covers: the mechanics of the wearable robot and it’s biomechanical interaction with the user, including state-of-the-art technologies that enable sensory and motor interaction between human (biological) and wearable artificial (mechatronic) systems; the basis for bioinspiration and biomimetism, general rules for the development of biologically-inspired designs, and how these could serve recursively as biological models to explain biological systems; the study on the development of networks for wearable robotics. Wearable Robotics: Biomechatronic Exoskeletons will appeal to lecturers, senior undergraduate students, postgraduates and other researchers of medical, electrical and bio engineering who are interested in the area of assistive robotics. Active system developers in this sector of the engineering industry will also find it an informative and welcome resource.
