タイトル | Two-Stage Passive Vibration Isolator |
本文(外部サイト) | http://hdl.handle.net/2060/20080047196 |
著者(英) | Goullioud, Renaud; Bronowicki, Allen J.; Neville, Timothy; MacDonald, Rhonda; Platus, David; Gursel, Yekta |
著者所属(英) | California Inst. of Tech. |
発行日 | 2008-11-01 |
言語 | eng |
内容記述 | The design and testing of a structural system were implemented to hold the optics of the planned Space Interferometry Mission (SIM) at positions and orientations characterized by vibrational translation and rotation errors of no more than a few nanometers or a few milliarcseconds, respectively. Much of the effort was devoted to a test bed for verifying the predicted behavior of a vibration- isolation structural subsystem working together with an active control system for positioning and orienting the SIM optics. There was considerable emphasis on the vibration-isolation subsystem, which was passive and comprised two stages. The main sources of vibration were six reaction wheels in an assembly denoted the "backpack." The first vibration-isolation stage consisted of hexapod isolator mounts - one for each reaction wheel - characterized by a natural vibration frequency of 10 Hz. The second stage was a set of three beams, disposed between the backpack and the structure that held the SIM optics, that were flexured such that they transmitted only bending loads, with a natural vibrational frequency and damping of about 5 Hz and 4 percent, respectively. Preliminary test results were presented and characterized as demonstrating the effectiveness of the two-stage vibration-isolation design. |
NASA分類 | Structural Mechanics |
レポートNO | NPO-30734 |
権利 | Copyright, Distribution as joint owner in the copyright |
URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/510047 |
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