TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
Online ISSN : 1884-0485
ISSN-L : 1884-0485
Induced Vibration of High-Precision Extensible Optical Bench during Extension on Orbit
Kosei ISHIMURAManabu ISHIDATaro KAWANOKenji MINESUGIKazuhisa ABETakashi SASAKIRyo IIZUKANobutaka BANDO
Author information
JOURNALS FREE ACCESS

2018 Volume 16 Issue 2 Pages 181-187

Details
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 150 kg, 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.

Information related to the author
© 2018 The Japan Society for Aeronautical and Space Sciences
Previous article Next article
feedback
Top