Athermalization of deformable reflector’s actuators for radio astronomy satellites

Reo Kashiyama, Hiraku Sakamoto, Masaaki Okuma, Hiroaki Tanaka, Kosei Ishimura

研究成果: Conference contribution


This paper develops an athermalization method to cancel the mismatch of the coefficient of thermal expansion (CTE) that exists in active control mechanisms, through analysis, prototyping, and tests. Essentially, the CTE mismatch between piezoceramics and the other structures made of super invar is cancelled by combing with another metallic part. In addition, this paper clarifies the mechanism of thermal deformation caused by inner structure of a piezoelectric stack actuator. It shows in both finite-element analysis and tests that the CTE mismatch cancellation is affected by the dimension tolerance of the inner structure, but successfully adjustable by the proposed methods. Moreover, the high thermal sensitivity of the actuator is exploited to propose another type of smart actuator, which uses active thermal deformation. This alternative approach is also evaluated through analysis, prototyping, and tests.

ホスト出版物のタイトルAIAA Spacecraft Structures
出版社American Institute of Aeronautics and Astronautics Inc, AIAA
出版ステータスPublished - 2018
イベントAIAA Spacecraft Structures Conference, 2018 - Kissimmee, United States
継続期間: 2018 1月 82018 1月 12


名前AIAA Spacecraft Structures Conference, 2018


ConferenceAIAA Spacecraft Structures Conference, 2018
国/地域United States

ASJC Scopus subject areas

  • 航空宇宙工学
  • 電子工学および電気工学
  • 機械工学
  • コンピュータ サイエンスの応用


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