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

抄録

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.

元の言語English
ホスト出版物のタイトルAIAA Spacecraft Structures
出版者American Institute of Aeronautics and Astronautics Inc, AIAA
エディション210019
ISBN(印刷物)9781624105302
DOI
出版物ステータスPublished - 2018 1 1
外部発表Yes
イベントAIAA Spacecraft Structures Conference, 2018 - Kissimmee, United States
継続期間: 2018 1 82018 1 12

Other

OtherAIAA Spacecraft Structures Conference, 2018
United States
Kissimmee
期間18/1/818/1/12

Fingerprint

Radio astronomy
Thermal expansion
Actuators
Satellites
Finite element method
Hot Temperature

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Computer Science Applications

これを引用

Kashiyama, R., Sakamoto, H., Okuma, M., Tanaka, H., & Ishimura, K. (2018). Athermalization of deformable reflector’s actuators for radio astronomy satellites. : AIAA Spacecraft Structures (210019 版). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-1199

Athermalization of deformable reflector’s actuators for radio astronomy satellites. / Kashiyama, Reo; Sakamoto, Hiraku; Okuma, Masaaki; Tanaka, Hiroaki; Ishimura, Kosei.

AIAA Spacecraft Structures. 210019. 編 American Institute of Aeronautics and Astronautics Inc, AIAA, 2018.

研究成果: Conference contribution

Kashiyama, R, Sakamoto, H, Okuma, M, Tanaka, H & Ishimura, K 2018, Athermalization of deformable reflector’s actuators for radio astronomy satellites. : AIAA Spacecraft Structures. 210019 Edn, American Institute of Aeronautics and Astronautics Inc, AIAA, AIAA Spacecraft Structures Conference, 2018, Kissimmee, United States, 18/1/8. https://doi.org/10.2514/6.2018-1199
Kashiyama R, Sakamoto H, Okuma M, Tanaka H, Ishimura K. Athermalization of deformable reflector’s actuators for radio astronomy satellites. : AIAA Spacecraft Structures. 210019 版 American Institute of Aeronautics and Astronautics Inc, AIAA. 2018 https://doi.org/10.2514/6.2018-1199
Kashiyama, Reo ; Sakamoto, Hiraku ; Okuma, Masaaki ; Tanaka, Hiroaki ; Ishimura, Kosei. / Athermalization of deformable reflector’s actuators for radio astronomy satellites. AIAA Spacecraft Structures. 210019. 版 American Institute of Aeronautics and Astronautics Inc, AIAA, 2018.
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