Design and Testing of Reduced-Stiffness Umbilicals for Space Station Microgravity Isolation
We detail efforts on minimizing power electrical umbilical stiffness on the International Space Station active rack isolation system to improve system performance. The effects of wire conductor material, winding configurations, electrical insulation materials, and umbilical geometry were investigate...
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| Veröffentlicht in: | Journal of spacecraft and rockets 2001-07, Vol.38 (4), p.563-568 |
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| container_end_page | 568 |
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| container_title | Journal of spacecraft and rockets |
| container_volume | 38 |
| creator | Edberg, Donald L Wilson, Bruce W |
| description | We detail efforts on minimizing power electrical umbilical stiffness on the International Space Station active rack isolation system to improve system performance. The effects of wire conductor material, winding configurations, electrical insulation materials, and umbilical geometry were investigated. Dynamic sine-sweep measurements were made on a special test rig having an extremely low coefficient of sliding friction value of mu = 5 x 10 exp -6 . Transfer function analyses were used to assess the stiffness of current configurations and various alternates. Because of the very low stiffness of some candidates, the effect of 1-g umbilical sagging on the measurements had to be considered. A detailed comparison is provided of the properties of the different umbilical candidates tested. Several candidates provided dramatic dynamic stiffness reductions. |
| doi_str_mv | 10.2514/2.3717 |
| format | Article |
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The effects of wire conductor material, winding configurations, electrical insulation materials, and umbilical geometry were investigated. Dynamic sine-sweep measurements were made on a special test rig having an extremely low coefficient of sliding friction value of mu = 5 x 10 exp -6 . Transfer function analyses were used to assess the stiffness of current configurations and various alternates. Because of the very low stiffness of some candidates, the effect of 1-g umbilical sagging on the measurements had to be considered. A detailed comparison is provided of the properties of the different umbilical candidates tested. 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The effects of wire conductor material, winding configurations, electrical insulation materials, and umbilical geometry were investigated. Dynamic sine-sweep measurements were made on a special test rig having an extremely low coefficient of sliding friction value of mu = 5 x 10 exp -6 . Transfer function analyses were used to assess the stiffness of current configurations and various alternates. Because of the very low stiffness of some candidates, the effect of 1-g umbilical sagging on the measurements had to be considered. A detailed comparison is provided of the properties of the different umbilical candidates tested. Several candidates provided dramatic dynamic stiffness reductions.</description><subject>Dynamic mechanical analysis</subject><subject>Electric conductors</subject><subject>Electric insulating materials</subject><subject>Friction</subject><subject>Microgravity</subject><subject>Microgravity processing</subject><subject>Space stations</subject><subject>Stiffness</subject><subject>Transfer functions</subject><subject>Winding</subject><issn>0022-4650</issn><issn>1533-6794</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><recordid>eNqNkV9LwzAUxYMoOKd-hoCgvnQmN2naPop_BxPBzScfQpomI6NrZ9OK-_ZmmzDdg_h04d4f53DPQeiUkgHElF_BgCU02UM9GjMWiSTj-6hHCEDERUwO0ZH3M0KoSEXWQ2-3xrtphVVV4InxraumuLb4xRSdNkU0bp21lfEev85zVzqtSo9t3eDxQmmDx61qXV3hJ6ebetqoD9cu8dDX5Xp9jA5s4M3J9-yjyf3d5OYxGj0_DG-uR5HihLcRJxZiJTKTF0JYCjwljANLUw06hxwKQVNqRSZUzCDN80RDBrkuYlIIiAXro4uN7KKp37vwg5w7r01ZqsrUnZcJ54LROOGBPP-TBBGCA8r-AYosIWzlfbYDzuquqcK3EqigwTpL6VYupOR9Y6xcNG6umqWkRK46kyBXnQXwcgMqp9QPqfVVLgorbVeWrflst86_0R3BL8jaoBs</recordid><startdate>20010701</startdate><enddate>20010701</enddate><creator>Edberg, Donald L</creator><creator>Wilson, Bruce W</creator><general>American Institute of Aeronautics and Astronautics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><scope>7TC</scope></search><sort><creationdate>20010701</creationdate><title>Design and Testing of Reduced-Stiffness Umbilicals for Space Station Microgravity Isolation</title><author>Edberg, Donald L ; Wilson, Bruce W</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a404t-40f25a69ebd66f12480342388c2cb2b2d6181f696a5328bb7c292bcd50d62563</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2001</creationdate><topic>Dynamic mechanical analysis</topic><topic>Electric conductors</topic><topic>Electric insulating materials</topic><topic>Friction</topic><topic>Microgravity</topic><topic>Microgravity processing</topic><topic>Space stations</topic><topic>Stiffness</topic><topic>Transfer functions</topic><topic>Winding</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Edberg, Donald L</creatorcontrib><creatorcontrib>Wilson, Bruce W</creatorcontrib><collection>CrossRef</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Mechanical Engineering Abstracts</collection><jtitle>Journal of spacecraft and rockets</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Edberg, Donald L</au><au>Wilson, Bruce W</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Design and Testing of Reduced-Stiffness Umbilicals for Space Station Microgravity Isolation</atitle><jtitle>Journal of spacecraft and rockets</jtitle><date>2001-07-01</date><risdate>2001</risdate><volume>38</volume><issue>4</issue><spage>563</spage><epage>568</epage><pages>563-568</pages><issn>0022-4650</issn><eissn>1533-6794</eissn><abstract>We detail efforts on minimizing power electrical umbilical stiffness on the International Space Station active rack isolation system to improve system performance. 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| identifier | ISSN: 0022-4650 |
| ispartof | Journal of spacecraft and rockets, 2001-07, Vol.38 (4), p.563-568 |
| issn | 0022-4650 1533-6794 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_26717213 |
| source | Alma/SFX Local Collection |
| subjects | Dynamic mechanical analysis Electric conductors Electric insulating materials Friction Microgravity Microgravity processing Space stations Stiffness Transfer functions Winding |
| title | Design and Testing of Reduced-Stiffness Umbilicals for Space Station Microgravity Isolation |
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