Automated tether management system for extravehicular activities
Identifieur interne : 004F49 ( Istex/Corpus ); précédent : 004F48; suivant : 004F50Automated tether management system for extravehicular activities
Auteurs : Mark A. Minor ; Christopher R. HirschiSource :
- Journal of Field Robotics [ 1556-4959 ] ; 2007-04.
Abstract
Safe extravehicular activity (EVA) requires astronauts to employ tethers to ensure proximity to their spacecraft. This research strives to improve EVA efficiency by allowing crew members to remotely release and retract their safety tether from extended distances using a tether management system consisting of a remotely releasable robotic gripper and a retractor that controls the length of tether. This circumvents the current need to travel back to the tether anchor and manually release the tether, which requires the crew member to travel three times further than necessary. The automated tether management system is essentially a multifunctional teleoperated robotic system that has the potential to improve EVA efficiency, reduce crew‐member fatigue, and improve efficiency of existing robots such as Robonaut. Design and performance requirements are specified to comply with current safety standards. The multifunctional gripper is designed to provide fail‐safe self‐locking positive engagement on a variety of spacecraft anchors. The retractor employs motorized and passive retraction to minimize power consumption, allow the retractor to mimic existing retractable safety tethers functionality, and facilitate control over gripper flight. A nonconductive fiber‐optic core structural tether is designed to transmit commands to the gripper while reducing the risk of developing electrical charges at orbital velocities. Experiments in a simulated microgravity environment evaluate behavior during gripper release and retraction and provide guidelines for improved system operation. Based on these guidelines, the system is then further optimized via simulation for improved retraction considering orbital dynamics. These results provide a recommended operating envelope to allow safe automated gripper retraction. © 2007 Wiley Periodicals, Inc.
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DOI: 10.1002/rob.20188
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This research strives to improve EVA efficiency by allowing crew members to remotely release and retract their safety tether from extended distances using a tether management system consisting of a remotely releasable robotic gripper and a retractor that controls the length of tether. This circumvents the current need to travel back to the tether anchor and manually release the tether, which requires the crew member to travel three times further than necessary. The automated tether management system is essentially a multifunctional teleoperated robotic system that has the potential to improve EVA efficiency, reduce crew‐member fatigue, and improve efficiency of existing robots such as Robonaut. Design and performance requirements are specified to comply with current safety standards. The multifunctional gripper is designed to provide fail‐safe self‐locking positive engagement on a variety of spacecraft anchors. The retractor employs motorized and passive retraction to minimize power consumption, allow the retractor to mimic existing retractable safety tethers functionality, and facilitate control over gripper flight. A nonconductive fiber‐optic core structural tether is designed to transmit commands to the gripper while reducing the risk of developing electrical charges at orbital velocities. Experiments in a simulated microgravity environment evaluate behavior during gripper release and retraction and provide guidelines for improved system operation. Based on these guidelines, the system is then further optimized via simulation for improved retraction considering orbital dynamics. These results provide a recommended operating envelope to allow safe automated gripper retraction. © 2007 Wiley Periodicals, Inc.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Mark A. 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This circumvents the current need to travel back to the tether anchor and manually release the tether, which requires the crew member to travel three times further than necessary. The automated tether management system is essentially a multifunctional teleoperated robotic system that has the potential to improve EVA efficiency, reduce crew‐member fatigue, and improve efficiency of existing robots such as Robonaut. Design and performance requirements are specified to comply with current safety standards. The multifunctional gripper is designed to provide fail‐safe self‐locking positive engagement on a variety of spacecraft anchors. The retractor employs motorized and passive retraction to minimize power consumption, allow the retractor to mimic existing retractable safety tethers functionality, and facilitate control over gripper flight. A nonconductive fiber‐optic core structural tether is designed to transmit commands to the gripper while reducing the risk of developing electrical charges at orbital velocities. Experiments in a simulated microgravity environment evaluate behavior during gripper release and retraction and provide guidelines for improved system operation. Based on these guidelines, the system is then further optimized via simulation for improved retraction considering orbital dynamics. These results provide a recommended operating envelope to allow safe automated gripper retraction. © 2007 Wiley Periodicals, Inc.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Automated tether management system for extravehicular activities</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Automated Tether Management System for Extravehicular Activities</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Automated tether management system for extravehicular activities</title></titleInfo><name type="personal"><namePart type="given">Mark A.</namePart><namePart type="family">Minor</namePart><affiliation>Department of Mechanical Engineering University of Utah 50 S. Central Campus Drive, Room 2110 Salt Lake City, Utah 84112</affiliation><affiliation>E-mail: minor@mech.utah.edu</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Christopher R.</namePart><namePart type="family">Hirschi</namePart><affiliation>Department of Mechanical Engineering University of Utah 50 S. Central Campus Drive, Room 2110 Salt Lake City, Utah 84112</affiliation><affiliation>E-mail: christopherrobinh@hotmail.com</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">2007-04</dateIssued><dateCaptured encoding="w3cdtf">2006-06-09</dateCaptured><dateValid encoding="w3cdtf">2007-02-05</dateValid><copyrightDate encoding="w3cdtf">2007</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">29</extent><extent unit="tables">1</extent><extent unit="references">71</extent><extent unit="words">250</extent></physicalDescription><abstract lang="en">Safe extravehicular activity (EVA) requires astronauts to employ tethers to ensure proximity to their spacecraft. This research strives to improve EVA efficiency by allowing crew members to remotely release and retract their safety tether from extended distances using a tether management system consisting of a remotely releasable robotic gripper and a retractor that controls the length of tether. This circumvents the current need to travel back to the tether anchor and manually release the tether, which requires the crew member to travel three times further than necessary. The automated tether management system is essentially a multifunctional teleoperated robotic system that has the potential to improve EVA efficiency, reduce crew‐member fatigue, and improve efficiency of existing robots such as Robonaut. Design and performance requirements are specified to comply with current safety standards. The multifunctional gripper is designed to provide fail‐safe self‐locking positive engagement on a variety of spacecraft anchors. The retractor employs motorized and passive retraction to minimize power consumption, allow the retractor to mimic existing retractable safety tethers functionality, and facilitate control over gripper flight. A nonconductive fiber‐optic core structural tether is designed to transmit commands to the gripper while reducing the risk of developing electrical charges at orbital velocities. Experiments in a simulated microgravity environment evaluate behavior during gripper release and retraction and provide guidelines for improved system operation. Based on these guidelines, the system is then further optimized via simulation for improved retraction considering orbital dynamics. These results provide a recommended operating envelope to allow safe automated gripper retraction. © 2007 Wiley Periodicals, Inc.</abstract><relatedItem type="host"><titleInfo><title>Journal of Field Robotics</title></titleInfo><titleInfo type="abbreviated"><title>J. Field Robotics</title></titleInfo><name type="personal"><namePart type="given">Alonzo</namePart><namePart type="family">Kelly</namePart></name><name type="personal"><namePart type="given">Larry</namePart><namePart type="family">Matthies</namePart></name><name type="personal"><namePart type="given">David</namePart><namePart type="family">Wettergreen</namePart></name><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Research Article</topic></subject><identifier type="ISSN">1556-4959</identifier><identifier type="eISSN">1556-4967</identifier><identifier type="DOI">10.1002/(ISSN)1556-4967</identifier><identifier type="PublisherID">ROB</identifier><part><date>2007</date><detail type="title"><title>Special Issue on Space Robotics, Part II</title></detail><detail type="volume"><caption>vol.</caption><number>24</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>311</start><end>337</end><total>27</total></extent></part></relatedItem><relatedItem type="preceding"><titleInfo><title>Journal of Robotic Systems</title></titleInfo><identifier type="ISSN">0741-2223</identifier><identifier type="ISSN">1097-4563</identifier><part><date point="end">2005</date><detail type="volume"><caption>last vol.</caption><number>22</number></detail><detail type="issue"><caption>last no.</caption><number>12</number></detail></part></relatedItem><identifier type="istex">397ACAF9B54F0FCA810F53438332D316A3A5594A</identifier><identifier type="DOI">10.1002/rob.20188</identifier><identifier type="ArticleID">ROB20188</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2007 Wiley Periodicals, Inc., A Wiley Company</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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