Vibration properties of hard x-ray telescope on board satellite

Tatsuro Kosaka, Takeyuki Igarashi, Hisamitsu Awaki, Keiji Ogi, Keitaro Itoh, Yoshitomo Maeda, Manabu Ichida, Akihiro Furuzawa, Takuya Miyazawa, Hideyo Kunieda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

ASTRO-H is the new Japanese X-ray astronomy satellite for launch in 2013. HXT on board the satellite has a mirror housing which is a cylindrical case and contains reflection mirror foils, which are constrained by alignment bars. In order to investigate vibration properties of HXT on board the satellite, vibration tests and FEM analyses were conducted. From the results of x-vibration test, it was found that there were no resonant frequencies at frequency less than 120 Hz. It also appeared that foils move along grooves of alignment bars when the housing was vibrated because kinetic connection between foils and alignment bars is only friction force. From the simulated results, this loose connection used in the actual HXT housing is useful to suppress a strong resonance at 51Hz predicted by supposing tight connections such as adhesiveness. As for z-vibration properties, vibration property of the housing was complicated since foils leap when zacceleration becomes larger than 1G. However it could be confirmed that the distinct resonant peaks did not appear at frequency less than 200 Hz. From these results, it was found that HXT housing had not any resonant frequencies less than 120 Hz, which is the maximum frequency of sinusoidal vibrations applied when launched.

Original languageEnglish
Title of host publicationSpace Telescopes and Instrumentation 2010
Subtitle of host publicationUltraviolet to Gamma Ray
Volume7732
DOIs
Publication statusPublished - 19-10-2010
Externally publishedYes
EventSpace Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray - San Diego, CA, United States
Duration: 28-06-201002-07-2010

Other

OtherSpace Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray
CountryUnited States
CitySan Diego, CA
Period28-06-1002-07-10

Fingerprint

x ray telescopes
Hard X-ray
Telescopes
Telescope
Vibration
Metal foil
Satellites
foils
X rays
vibration
vibration tests
alignment
Alignment
Resonant Frequency
resonant frequencies
Natural frequencies
Mirrors
Mirror
mirrors
X-ray Astronomy

All Science Journal Classification (ASJC) codes

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Kosaka, T., Igarashi, T., Awaki, H., Ogi, K., Itoh, K., Maeda, Y., ... Kunieda, H. (2010). Vibration properties of hard x-ray telescope on board satellite. In Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray (Vol. 7732). [77323G] https://doi.org/10.1117/12.856846
Kosaka, Tatsuro ; Igarashi, Takeyuki ; Awaki, Hisamitsu ; Ogi, Keiji ; Itoh, Keitaro ; Maeda, Yoshitomo ; Ichida, Manabu ; Furuzawa, Akihiro ; Miyazawa, Takuya ; Kunieda, Hideyo. / Vibration properties of hard x-ray telescope on board satellite. Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol. 7732 2010.
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abstract = "ASTRO-H is the new Japanese X-ray astronomy satellite for launch in 2013. HXT on board the satellite has a mirror housing which is a cylindrical case and contains reflection mirror foils, which are constrained by alignment bars. In order to investigate vibration properties of HXT on board the satellite, vibration tests and FEM analyses were conducted. From the results of x-vibration test, it was found that there were no resonant frequencies at frequency less than 120 Hz. It also appeared that foils move along grooves of alignment bars when the housing was vibrated because kinetic connection between foils and alignment bars is only friction force. From the simulated results, this loose connection used in the actual HXT housing is useful to suppress a strong resonance at 51Hz predicted by supposing tight connections such as adhesiveness. As for z-vibration properties, vibration property of the housing was complicated since foils leap when zacceleration becomes larger than 1G. However it could be confirmed that the distinct resonant peaks did not appear at frequency less than 200 Hz. From these results, it was found that HXT housing had not any resonant frequencies less than 120 Hz, which is the maximum frequency of sinusoidal vibrations applied when launched.",
author = "Tatsuro Kosaka and Takeyuki Igarashi and Hisamitsu Awaki and Keiji Ogi and Keitaro Itoh and Yoshitomo Maeda and Manabu Ichida and Akihiro Furuzawa and Takuya Miyazawa and Hideyo Kunieda",
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Kosaka, T, Igarashi, T, Awaki, H, Ogi, K, Itoh, K, Maeda, Y, Ichida, M, Furuzawa, A, Miyazawa, T & Kunieda, H 2010, Vibration properties of hard x-ray telescope on board satellite. in Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. vol. 7732, 77323G, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, San Diego, CA, United States, 28-06-10. https://doi.org/10.1117/12.856846

Vibration properties of hard x-ray telescope on board satellite. / Kosaka, Tatsuro; Igarashi, Takeyuki; Awaki, Hisamitsu; Ogi, Keiji; Itoh, Keitaro; Maeda, Yoshitomo; Ichida, Manabu; Furuzawa, Akihiro; Miyazawa, Takuya; Kunieda, Hideyo.

Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol. 7732 2010. 77323G.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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T1 - Vibration properties of hard x-ray telescope on board satellite

AU - Kosaka, Tatsuro

AU - Igarashi, Takeyuki

AU - Awaki, Hisamitsu

AU - Ogi, Keiji

AU - Itoh, Keitaro

AU - Maeda, Yoshitomo

AU - Ichida, Manabu

AU - Furuzawa, Akihiro

AU - Miyazawa, Takuya

AU - Kunieda, Hideyo

PY - 2010/10/19

Y1 - 2010/10/19

N2 - ASTRO-H is the new Japanese X-ray astronomy satellite for launch in 2013. HXT on board the satellite has a mirror housing which is a cylindrical case and contains reflection mirror foils, which are constrained by alignment bars. In order to investigate vibration properties of HXT on board the satellite, vibration tests and FEM analyses were conducted. From the results of x-vibration test, it was found that there were no resonant frequencies at frequency less than 120 Hz. It also appeared that foils move along grooves of alignment bars when the housing was vibrated because kinetic connection between foils and alignment bars is only friction force. From the simulated results, this loose connection used in the actual HXT housing is useful to suppress a strong resonance at 51Hz predicted by supposing tight connections such as adhesiveness. As for z-vibration properties, vibration property of the housing was complicated since foils leap when zacceleration becomes larger than 1G. However it could be confirmed that the distinct resonant peaks did not appear at frequency less than 200 Hz. From these results, it was found that HXT housing had not any resonant frequencies less than 120 Hz, which is the maximum frequency of sinusoidal vibrations applied when launched.

AB - ASTRO-H is the new Japanese X-ray astronomy satellite for launch in 2013. HXT on board the satellite has a mirror housing which is a cylindrical case and contains reflection mirror foils, which are constrained by alignment bars. In order to investigate vibration properties of HXT on board the satellite, vibration tests and FEM analyses were conducted. From the results of x-vibration test, it was found that there were no resonant frequencies at frequency less than 120 Hz. It also appeared that foils move along grooves of alignment bars when the housing was vibrated because kinetic connection between foils and alignment bars is only friction force. From the simulated results, this loose connection used in the actual HXT housing is useful to suppress a strong resonance at 51Hz predicted by supposing tight connections such as adhesiveness. As for z-vibration properties, vibration property of the housing was complicated since foils leap when zacceleration becomes larger than 1G. However it could be confirmed that the distinct resonant peaks did not appear at frequency less than 200 Hz. From these results, it was found that HXT housing had not any resonant frequencies less than 120 Hz, which is the maximum frequency of sinusoidal vibrations applied when launched.

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Kosaka T, Igarashi T, Awaki H, Ogi K, Itoh K, Maeda Y et al. Vibration properties of hard x-ray telescope on board satellite. In Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray. Vol. 7732. 2010. 77323G https://doi.org/10.1117/12.856846