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首页> 美国政府科技报告 >Application of Passive Damping to Increase Performance of the Sodium Guidestar on the AEOS 3.6 m Telescope.
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Application of Passive Damping to Increase Performance of the Sodium Guidestar on the AEOS 3.6 m Telescope.

机译：应用被动阻尼提高钠引导星在aEOs 3.6 m望远镜上的性能。

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A sodium guidestar will be incorporated into the AEOS 3.6 m telescope and is scheduled for completion in early 2014. The optical path of the guidestar includes a beam expander and transfer optics ending with a relatively large elevation flat before the laser beam is launched into the sky. The elevation flat is cantilevered off the elevation axis to maintain boresight with the telescope. While this simplifies alignment, it introduces a challenging structural dynamics problem since vibration of the cantilevered optic translates directly into guidestar jitter. Initial measurements of the elevation flat show that vibration levels are high enough to impact guidestar performance in relatively benign ambient conditions. To decrease this vibration, a tuned mass damper has been designed for the elevation flat and will be integrated into the system. This damper will significantly decrease vibration of the elevation flat by adding damping to the elevation flat's first vibration mode. This paper presents the initial vibration measurements that quantified current vibration levels and the analysis used to design the tuned mass damper treatment.

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