17 September 2012 Vibration properties of mirror foils for hard x-ray telescope onboard satellite
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Abstract
ASTRO-H is a next version of Japanese X=ray astronomy satellite for lunch in 2014. The hard X-rray telescope (HXT) on board the satellite has a cylindrical mirror housing which contains reflection circular mirror foils. In the present paper, vibration properties of the mirror foils installed in the HXT on-board a satellite were investigated. Vibration tests and FEM analysis of mirror foils installed in the part model of HXT were conducted. From the experimental results, it appeared that the mirror had resonant frequenxcies at 64, 73 and 118Hz. The modal shapes of 64 and 73Hz peaks shhoed that the maximum amplitude appeared at edges of the foil. On the other hand, vibration amplitude became maximum at the center in the modal shape of 118 Hz peak. In addition, it appeared that the first peak of the edge mode decreased with increasing acceleration while the second peak had weak dependency on acceleration. These vibration behaviours are thought to be governed degree of constraint of the connections between the foil and alignment bars.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Takahiro Yoshimura, Takahiro Yoshimura, Tatsuro Kosaka, Tatsuro Kosaka, Hisamitsu Awaki, Hisamitsu Awaki, Keiji Ogi, Keiji Ogi, Manabu Ishida, Manabu Ishida, Yoshitomo Maeda, Yoshitomo Maeda, Akihiro Furuzawa, Akihiro Furuzawa, Takuya Miyazawa, Takuya Miyazawa, Nobuyuki Yamane, Nobuyuki Yamane, Hiroyoshi Kato, Hiroyoshi Kato, Hideyo Kunieda, Hideyo Kunieda, } "Vibration properties of mirror foils for hard x-ray telescope onboard satellite", Proc. SPIE 8443, Space Telescopes and Instrumentation 2012: Ultraviolet to Gamma Ray, 84435A (17 September 2012); doi: 10.1117/12.925864; https://doi.org/10.1117/12.925864
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