Power Management of Lunar CubeSat Mission EQUULEUS Under Uncertainties of Power Generation and Consumption

Yusuke MURATA; Nobuhiro FUNABIKI; Hiroki AOHAMA; Shintaro NAKAJIMA; Shuhei MATSUSHITA; Keita NISHII; Ryohei TAKAHASHI; Yosuke KAWABATA; Satoshi IKARI; Kota MIYOSHI; Ryu FUNASE

doi:10.2322/tastj.19.377

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Power Management of Lunar CubeSat Mission EQUULEUS Under Uncertainties of Power Generation and Consumption

Yusuke MURATA, Nobuhiro FUNABIKI, Hiroki AOHAMA, Shintaro NAKAJIMA, Shuhei MATSUSHITA, Keita NISHII, Ryohei TAKAHASHI, Yosuke KAWABATA, Satoshi IKARI, Kota MIYOSHI, Ryu FUNASE

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Yusuke MURATA
Department of Aeronautics and Astronautics, The University of Tokyo
Nobuhiro FUNABIKI
Department of Aeronautics and Astronautics, The University of Tokyo
Hiroki AOHAMA
Department of Aeronautics and Astronautics, The University of Tokyo
Shintaro NAKAJIMA
Department of Aeronautics and Astronautics, The University of Tokyo
Shuhei MATSUSHITA
Department of Aeronautics and Astronautics, The University of Tokyo
Keita NISHII
Department of Aeronautics and Astronautics, The University of Tokyo
Ryohei TAKAHASHI
Department of Aeronautics and Astronautics, The University of Tokyo
Yosuke KAWABATA
Department of Aeronautics and Astronautics, The University of Tokyo
Satoshi IKARI
Department of Aeronautics and Astronautics, The University of Tokyo
Kota MIYOSHI
Institute of Space and Astronautical Science, JAXA
Ryu FUNASE
Department of Aeronautics and Astronautics, The University of Tokyo
Institute of Space and Astronautical Science, JAXA

Keywords: EQUULEUS, Power Management, MPPT, Probabilistic Analysis

JOURNAL FREE ACCESS

2021 Volume 19 Issue 3 Pages 377-383

DOI https://doi.org/10.2322/tastj.19.377

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Abstract

This paper highlights the power system design of the equilibrium lunar–Earth point 6-unit spacecraft (EQUULEUS), which will fly to the second Earth–Moon Lagrange point and perform a variety of scientific and technological missions. The limited power generation and high uncertainties of power generation and consumption are major difficulties encountered by the electrical power system of EQUULEUS for ensuring the feasibility of its mission. To address these issues, some methodologies are described in this paper in detail, which include the unique component arrangement, maximum power-point tracking function, and probabilistic analysis of power management. For the probabilistic analysis, Monte Carlo simulations are conducted based on a numerical model, and the feasibility of the power balance between generation and consumption is verified.

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