JP6842169B2 - シート状構造体、形状推定方法、及び宇宙機 - Google Patents
シート状構造体、形状推定方法、及び宇宙機 Download PDFInfo
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- H—ELECTRICITY
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- B64G1/28—Guiding or controlling apparatus, e.g. for attitude control using inertia or gyro effect
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Description
前記シート状部材は、厚さ方向に直交する面内方向に沿って延び、光が入射する。
前記複数の検出センサは、前記シート状部材に前記面内方向に沿って分散して配置され、各配置位置における前記光の前記シート状部材に対する入射角を検出するためのセンサである。
例えば薄膜太陽電池を用いることで、太陽光の入射角を容易に検出することが可能となり、シート状の形状を容易に推定することが可能となる。
例えば温度センサを用いることで、光の入射角を容易に検出することが可能となり、シート状の形状を容易に推定することが可能となる。
前記光の前記基準面に対する入射方向に関する第1の情報が取得される。
前記入射方向が互いに異なる2以上の状態で、前記シート状構造体に分散して配置された複数の検出位置における前記光の前記シート状構造体に対する入射角に関する第2の情報が取得される。
前記2以上の状態における前記第1及び前記第2の情報に基づいて、前記シート状構造体の形状が推定される。
これにより、シート状構造体の形状を基準面に直交する方向の成分から推定することが可能となる。この結果、形状の推定に要する演算量等が抑制され演算速度が向上する。
これにより、例えばシート状構造体の形状をリアルタイムで監視することが可能となる。
前記シート状構造体は、シート状部材と、複数の検出センサと、を具備する。
前記シート状部材は、厚さ方向に直交する面内方向に沿って延び、光が入射する。
前記複数の検出センサは、前記シート状部材に前記面内方向に沿って分散して配置され、各配置位置における前記光の前記シート状部材に対する入射角を検出するためのセンサである。
図1は、本発明の一実施形態に係るセイル10を備えた宇宙機100の斜視図である。図1に示すように、宇宙機100は、セイル10と、宇宙機本体20とを有する。宇宙機100は、セイル10を展張して宇宙空間を航行するソーラーセイルである。本実施形態では、セイル10は、シート状構造体に相当する。
本実施形態では、セイル10の基準面16を基準としたXYZ座標系を用いてセイル10の形状を表す。以下では、セイル10の面内方向の変形は無視できるものと仮定する。従ってセイル10の面内方向に直交する方向(Z軸方向)の変形を推定することにより、セイル10の形状が推定される。以下では、正方形状のセイルの一辺の長さをLと記載する。
上記では、シート状の構造を有する大規模な構造体(シート状構造体)の一例としてソーラーセイルについて説明した。こうした柔軟性を有するシート状の部材(薄膜やメッシュ等)により構成される巨大な構造体は、ゴッサマー構造体(Gossamer Structure)と呼ばれる。以下ではセイル10とは別のゴッサマー構造体について説明する。
11…シート状部材
12…検出センサ
13…表面
14…裏面
16…基準面
20…宇宙機本体
30…太陽光
40…薄膜太陽電池
50、50a、50b…温度センサ
100…宇宙機
200、300…ゴッサマー構造体
β…局所入射角
n…局所法線ベクトル
P…配置位置
S…太陽ベクトル
Claims (8)
- 厚さ方向に直交する面内方向に沿って延び、光が入射するシート状部材と、
前記シート状部材に前記面内方向に沿って分散して配置され、各配置位置における前記光の前記シート状部材に対する入射角を検出するための複数の検出センサと
を具備するシート状構造体。 - 請求項1に記載のシート状構造体であって、
前記光が太陽光を含み、
前記複数の検出センサは、薄膜太陽電池を含む
シート状構造体。 - 請求項1又は2に記載のシート状構造体であって、
前記複数の検出センサは、温度センサを含む
シート状構造体。 - 光が入射するシート状構造体の基準面を設定し、
前記光の前記基準面に対する入射方向に関する第1の情報を取得し、
前記入射方向が互いに異なる2以上の状態で、前記シート状構造体に分散して配置された複数の検出位置における前記光の前記シート状構造体に対する入射角に関する第2の情報を取得し、
前記2以上の状態における前記第1及び前記第2の情報に基づいて、前記シート状構造体の形状を推定する
形状推定方法。 - 請求項4に記載の形状推定方法であって、
前記シート状構造体の前記複数の検出位置の各々について、前記基準面に直交する直交方向の位置を推定することで、前記シート状構造体の形状を推定する
形状推定方法。 - 請求項4又は5に記載の形状推定方法であって、
前記シート状構造体の形状をモニタリングする
形状推定方法。 - シート状構造体と、前記シート状構造体に接続される本体と、を具備し、
前記シート状構造体は、
厚さ方向に直交する面内方向に沿って延び、光が入射するシート状部材と、
前記シート状部材に前記面内方向に沿って分散して配置され、各配置位置における前記光の前記シート状部材に対する入射角を検出するための複数の検出センサと、を有する
宇宙機。 - 請求項7に記載の宇宙機であって、
前記光が太陽光を含み、
前記本体は、前記太陽光の入射方向を検出する太陽センサを有する
宇宙機。
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JP2017135449A JP6842169B2 (ja) | 2017-07-11 | 2017-07-11 | シート状構造体、形状推定方法、及び宇宙機 |
US16/627,095 US11512944B2 (en) | 2017-07-11 | 2018-03-30 | Sheet-like structure, shape estimation method, and spacecraft |
PCT/JP2018/013902 WO2019012755A1 (ja) | 2017-07-11 | 2018-03-30 | シート状構造体、形状推定方法、及び宇宙機 |
US18/050,660 US11768070B2 (en) | 2017-07-11 | 2022-10-28 | Sheet-like structure, shape estimation method, and spacecraft |
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JP2017135449A JP6842169B2 (ja) | 2017-07-11 | 2017-07-11 | シート状構造体、形状推定方法、及び宇宙機 |
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JP6842169B2 true JP6842169B2 (ja) | 2021-03-17 |
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JPH06117924A (ja) * | 1992-08-19 | 1994-04-28 | Nippondenso Co Ltd | 光位置検出装置 |
JPH0669536A (ja) * | 1992-08-21 | 1994-03-11 | Nippondenso Co Ltd | 光位置検出装置の製造方法 |
JPH06123654A (ja) * | 1992-08-25 | 1994-05-06 | Nippondenso Co Ltd | 日射センサ |
EP0625692B2 (en) * | 1992-11-06 | 2004-05-19 | Denso Corporation | Pyrheliometric sensor |
EP0724165B1 (en) * | 1995-01-25 | 2001-12-05 | Control Devices, Inc. | Photosensor to detect the direction of incidence and intensity of optical radiation |
US6019320A (en) * | 1998-09-15 | 2000-02-01 | Hughes Electronics Corporation | Spacecraft acquisition of sun pointing |
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US6921050B2 (en) * | 2003-01-17 | 2005-07-26 | Northrop Grumman Corporation | Solar torque control using thin film directionally reflective, emissive, absorptive and transmissive surfaces |
KR100654975B1 (ko) * | 2005-07-27 | 2006-12-08 | 현대모비스 주식회사 | 차량용 일사량감지센서 |
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TWI444576B (zh) * | 2010-12-30 | 2014-07-11 | Nat Univ Tsing Hua | 利用感測器進行追日功能之裝置與方法 |
WO2012138915A1 (en) * | 2011-04-05 | 2012-10-11 | Integrated Plasmonics Corporation | Integrated plasmonic sensing device and apparatus |
US9310843B2 (en) * | 2013-01-02 | 2016-04-12 | Apple Inc. | Electronic devices with light sensors and displays |
US9041135B2 (en) * | 2013-03-13 | 2015-05-26 | The Aerospace Corporation | Monolithic sun sensors assemblies thereof |
US9116046B2 (en) * | 2013-03-15 | 2015-08-25 | Infineon Technologies Austria Ag | Device and method for determining a direction from a surface of one or more photodetector elements of an integrated circuit to a source providing electromagnetic waves and method for manufacturing an device |
DE102013006264A1 (de) * | 2013-04-11 | 2014-10-16 | Grenzebach Maschinenbau Gmbh | Vorrichtung und Verfahren zur optimalen Justierung der Linsenplatte in einem CPV-Modul |
DE102013109506A1 (de) * | 2013-08-30 | 2015-03-05 | CiS Forschungsinstitut für Mikrosensorik und Photovoltaik GmbH | Richtungssensitiver Fotosensor zur Erfassung der Einfallsrichtung von Licht |
US20150136944A1 (en) * | 2013-11-21 | 2015-05-21 | Avraham Segev | Sunlight tracking sensor and system |
JP6337673B2 (ja) * | 2014-07-28 | 2018-06-06 | 日本電気株式会社 | ソーラセイル及びそれを用いたソーラセイル宇宙機 |
US10160555B2 (en) * | 2015-04-22 | 2018-12-25 | Composite Technology Development, Inc. | Multiple boom deployment |
JP6745495B2 (ja) * | 2016-01-12 | 2020-08-26 | 学校法人北里研究所 | 形状推定装置、スキャニング装置、動作検出装置、形状推定方法、スキャニング方法、動作検出方法、プログラム |
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US11512944B2 (en) | 2022-11-29 |
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