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 language | English |
|---|---|
| Title of host publication | Space Telescopes and Instrumentation 2010 |
| Subtitle of host publication | Ultraviolet to Gamma Ray |
| Volume | 7732 |
| DOIs | |
| Publication status | Published - 19-10-2010 |
| Externally published | Yes |
| Event | Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray - San Diego, CA, United States Duration: 28-06-2010 → 02-07-2010 |
Other
| Other | Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray |
|---|---|
| Country | United States |
| City | San Diego, CA |
| Period | 28-06-10 → 02-07-10 |
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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
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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 proceeding › Conference contribution
TY - GEN
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.
UR - http://www.scopus.com/inward/record.url?scp=77957864697&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77957864697&partnerID=8YFLogxK
U2 - 10.1117/12.856846
DO - 10.1117/12.856846
M3 - Conference contribution
AN - SCOPUS:77957864697
SN - 9780819482228
VL - 7732
BT - Space Telescopes and Instrumentation 2010
ER -