公开(公告)号：EP0858946A1

公开(公告)日：1998-08-19

申请号：EP98100709.9

申请日：1998-01-16

申请人： TRW INC.

发明人： Dailey, Dean R. ,  Gilman, Larry N. ,  Parker, Dale A.

IPC分类号： B64G1/22

CPC分类号： B64G1/22 ,  B64G1/222

摘要： A precision deployable boom assembly 10 for terrestrial and celestial applications comprises an extendable and retractable boom 12 having a fixed end 14 , a movable distal end 20 and three or more cables 30 attached to the distal end to form a tripod configuration of the deployed boom. The boom is spring biased to urge extension of the boom and to produce a tensile pre-load in the cables. The cables are wound and unwound by cable drums 28 selectively driven by precise motors such as stepping motors 33 . The cables are preferably formed of graphite which provides high stiffness, light weight and a very low coefficient of thermal expansion. The position of the distal end is highly stable at all deployed lengths of the boom and is also precisely repeatable.

摘要翻译： 用于陆地和天体应用的精确可展开的起重臂组件10包括具有固定端14，可移动远端20和连接到远端的三个或更多个电缆30的可伸缩臂12，以形成展开吊杆的三脚架构造。 起重臂被弹簧偏压以促使悬臂的延伸并且在电缆中产生拉伸预加载。 电缆由选择性地由诸如步进电动机33的精确电动机驱动的电缆鼓28缠绕和解开。电缆优选地由石墨形成，其提供高刚度，重量轻和非常低的热膨胀系数。 远端的位置在悬臂的所有展开长度上是高度稳定的，并且也是精确可重复的。

公开(公告)号：EP0957288A2

公开(公告)日：1999-11-17

申请号：EP99109105.9

申请日：1999-05-07

申请人： TRW Inc.

发明人： Shtarkman, Emil M. ,  Doherty, Kathleen M. ,  Parker, Dale A.

IPC分类号： F16F15/00

CPC分类号： F16F15/005 ,  F16F9/53 ,  F16F15/03 ,  H01Q1/005 ,  H01Q1/288

摘要： A vibration control system is provided for an appendage such as an antenna 10 coupled to a platform such as a spacecraft 12. The antenna 10 is coupled at a base 14 so as to extend from the spacecraft 12. A plurality of guidelines 20 extend between remote portions 22 of the antenna 10 and the antenna base 14. A plurality of motion control elements 36 are provided within the antenna structure for reducing oscillation settling time of the antenna 10 relative to the spacecraft 12. The motion control elements 36 include a material disposed therein having its damping response changed according to the magnitude of an electric or magnetic field applied thereto.

摘要翻译： 为诸如耦合到诸如航天器12的平台的天线10提供振动控制系统。天线10在基座14处被联接以便从航天器12延伸。多个准则20在遥控器 天线10的部分22和天线基座14.多个运动控制元件36设置在天线结构内，用于减少天线10相对于航天器12的振荡稳定时间。运动控制元件36包括设置在天线10内的材料 其阻尼响应根据施加到其上的电场或磁场的大小而改变。