We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Induced Vibration of High-Precision Extensible Optical Bench during Extension on Orbit.
- Authors
Kosei ISHIMURA; Manabu ISHIDA; Taro KAWANO; Kenji MINESUGI; Kazuhisa ABE; Takashi SASAKI; Ryo IIZUKA; Nobutaka BANDO
- Abstract
An Extensible Optical Bench (EOB) for a X-ray satellite (ASTRO-H) had a length of 6.4m in extended configuration. Although the same type of extensible mast was used in Space Radio Telescope (Halca) in 1997, the tip mass was quite different in the case of ASTRO-H. Due to the tip mass of 150kg, the natural frequency of EOB was less than 1Hz in the extended configuration. ASTRO-H was launched on Feb. 17, 2016, and the EOB was extended on Feb. 28, 2016, successfully. However, because the vibration of EOB occurred during the extension, the extension operation was carried out over four passes intermittently. When the amplitude of induced vibration excessed the predefined threshold, we stopped the extension, then stayed until the vibration was damped. In this paper, the induced vibration during extension and its mechanism are reported. Through simulations, it is confirmed that one of the major causes of the vibration is a periodic change of gap between mast and canister at the root of EOB.
- Subjects
STATISTICAL accuracy; THRESHOLD (Perception); VIBRATION (Mechanics); SIMULATION methods &; models; TELESCOPES
- Publication
Transactions of the Japan Society of Aeronautical & Space Sciences, Aerospace Technology Japan, 2018, Vol 16, Issue 2, p181
- ISSN
1884-0485
- Publication type
Article
- DOI
10.2322/tastj.16.181