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    ###### tags: `電源系` `議事録` `EPS` `2020` # 2020/07/24 電源系会議 時刻 : 11:00~ 参加 :米山,西部,松藤,植田,永田,牛尾,渋谷,もっさ 過去の議事録 :[07/16](/@YRfw6TaSQQqveU5AoQvFTw/r1TL7Nakv/edit)[07/08](/@YRfw6TaSQQqveU5AoQvFTw/ryLnR17yw) [07/01](/@YRfw6TaSQQqveU5AoQvFTw/SkvJAPYRL) [06/24](/HJIUL50CTg-zl9dfmzYIzA) [06/16](/BGoG7ssRTH2hVQ9h_Tfrfw) [06/10](/XRHbrwB4RQKebnD87AqSfw) [06/03](/etKvAsXzSHW4NLBmFwWmUw) [05/26](/YdTQO_xNTZGxpkm7sEIgGQ)[05/20](/kNYt0kEHSt-nchqZuCDJvg) [05/12](/v9DWZGpyQ2SNGC1r-H8xWQ) [05/04](/gzEpPYTsRheVb5ZEqOryDA?) [04/29](/Ls-wUoFUR8mnH1jb7ZVz3g) [04/21](/m5OQG1ViQ6GJxZrrz86b4g) [04/11](/dCZ2hOJzRSCUQdKGiZB-vA) [04/04](/umZsgof8QvuvYDz3g9gu0Q) [03/28](/dRtwgGcbTXyTAsLQFgWrDw) [03/23](/Dtf3PWbQSsKvoskk6iVTnA) [03/14](/gbMIP3qFTquHJu4Pr9lCFw) [03/07](/7SstlAvSRxyvUol8uj5zRw) [02/29](/ACR7yFNoT8m5Oy7DUUv29A) [02/22](/VLxBfssPTICsHF5aYcWhAQ) [02/15](/prmolB4WT9q_OWXAFyGGPw) [02/08](/ycy7Mox7SmaS_cqX_oJ5_g) [02/01](/hGRFT1WCQpa0QXCjj3q5TQ) [01/25](/JLOa3Z6USZiMqGqKgIgr-A) [01/16](/u14uw4BtT5ahIENxR5st8g) [1/11](/VRr9J0aMTC-nbs9zMKggLg) [12/27](/rrBeb0MbRICYmoFri8bxVQ) [12/21](/8-lyZnPASlynECMlc-gLCA) [12/14](/Th_MRZgIQK-oF2nNVMjBsg)[12/07](/8z4aFtOMQC6mu3eV64htUA) [11/30](/RJEoY50LRtqz3gGIvQLHwA) [11/23](/hdxWvMpISI-v9Shf0fdFXA) [11/16](/m8boSSykRfCg5B79ZlIbcQ) [11/09](/w_77jzFrTsGacEInu8QubQ) [11/02](/Z6GFQvZUS3ab4jSKIbSVJQ) [10/30](/NOWSdvhvQ-yjkkMIBQ7vYA) [10/19](/r48CWwmBS7isZCLMc_ymFA?edit) [10/05](/ElTBRRBaQ4K6H8PSEta26w) [09/28](/4y0JfCsWRGuAmbRNbSwtSA) [09/21](/OjDtfVs7TZyxAvvqUCtCqw) [09/14](/O-3Wv9jZQQKuN4sXBRs25w) [09/07](/HoCyRD5IQBa2zdSsaOvWHw?edit) [8/31](/LmN_Ei1XTtGgmvmzEtPHgg?both) [8/24](/x7MPnZwxTn2Oa-3wDIXs2A?both) [08/17](/UagcAYMGQJG2H6nHQHJe7Q) [08/10](/dqG__FLKRM6ek5kLQtkydw) [08/03](/bhZJuaSPTVa4v1pQdzszUw) [07/20](/jnbKTYvjRpCJ6Rs26LcN7w) [07/13](/CLN9lvZwSRm1nj4GYKvGBQ) [07/06](/dbKE5uSTSwOHbheRyBf9Hw) [06/29](/514X5XkvSdmy_dl-1NEdfg) [06/22](/0P2NCimYQuqXQ9_K89paWA) [06/17](/0jgzeGAOQFmN7RCHAFtYKA) [06/08](/-d6I3KtGQ16uBxfrsLM2uw) [06/01](/FivaGOnKSPStbGtHvCgtbg) [05/25](/xDFa51kaREikNqAsK-MNrw) [05/11](/Oim_a2eITIy77AtJy4LHyQ) [05/04](/8-_gY2cYS4OPDpHvHJj24A) [04/27](/TN2rZZ7JQX6QtiNS_HbVFw) [04/20](/uYUiqIWPQpyGhYD1F1l14A) [04/13](/320q2Eo_QZyp2nwM-arJsg) [04/06](/y4y3xf_CSt6mSDTjVptoUw) [03/30](/_K3gQ5x5SjGpQERM8ukfDA) [03/23](/MbBtSN_wRVyBkufuFmOdkA) [03/16](/KzDM3bGHRIyRoYZ6REotDw) [03/02](/JZV4Vj62Qxyp6FyETzOa3g) [02/23](/2fMlIfnhQCifp1BPg9dvWQ) [02/16](/WlNDfq__Tqapj_Cfup5Fuw) [02/09](/Xa63bkilSEuz0YAT6GPx7g) [02/02](/RtIyWvI9TC-pNi3QGiVynw) [01/26](/-6fuhJ5ATnGmAyFQmFNv8A) [01/12](/08UXFD4nR9CzF3lSngwPJQ) [01/05](/n2J7dWpnT9OZtPgakqJ8Ow) [12/20](/1kq2xNLvQl6GyRKj0DffDQ) [12/08](/uvlNuWGkR_q82asHysMqzA) [12/01](/wOvBazKTTo-wdL-czVFx7A) [11/17](/ejPsgw7GSjK0Sgws0vu5tQ) [11/10](/3i3q530HRYyLtWOg9t1xXQ) [11/03](/qcDjEtD9QBWKHovF_BGs_A) [10/27](/asAVPwWTRge-k40vzoYzJw) [10/20](/O70tsJxYTsGAALujUvZvmw) [10/13](/dOo7adThR7uxmduvqwdzwA) [10/06](/77AG89z9RU2z-TVJaC5A9g) [09/29](/r6ErbOoeR-q41jffvng6bQ) [09/15](/tw1jWSgRSfq0ac2nkJhcNA) [09/08](/y8BuaqjxR06xquBI-B9SKw) [08/25](/O70tsJxYTsGAALujUvZvmw) # 連絡 # 電源系の打ち上げまでのタスク [スケジュール](https://www.dropbox.com/scl/fi/5jfjzejeulh3adtdzot38/WBS00_OPUSAT-II-_ver8.0.xlsx?dl=0&rlkey=h4iz9bc9smwsatfqaoex5q1n7) * 安全審査の資料作り  →渋谷さん * 振動試験前の構体組み立て時に太陽電池へのハーネスのはんだづけ(再び発生する) * インヒビットチェック(外観検査時) # 現状 千葉研での予備振動試験は行わないことに 今日~20日に最終組み立て ← 土日に太陽電池のハーネスはんだ付け 8/1本体組み立て,太陽電池貼り付け前動作確認 8/2(日)太陽電池貼り付け 8/3(月)最終動作確認 8/4(火)振動試験(@IMV) 8/4,5日安全審査資料提出 NASAの会議で空中配線が安全上大丈夫か?っていう指摘があった 空中配線を固定しないといけない ## セーフモード閾値 衛星運用時,ミッション実行中にバッテリ電圧の危険域への低下を防ぐために,ミッション開始時の閾値を設定してもらいたいという案件. 実行時の条件によって異なるため難しい. 0.2V 10%の余裕 2倍のマージン DOD70% 運用期間が短いのでバッテリの劣化考えずにDOD深めでも良い?(4/21追記) セーフモード閾値 3.7V(植田が連絡済)→もうちょっと考えるべき? ## 太陽電池関連 アンテナ面のはんだ付けはアンテナ展開を阻害する恐れがあるので,薄くはんだ付けすること ## インヒビットチェック フィットチェックのケースに入れた時に確認する. 手順はディプロイメントスイッチを入れた時に,フライトピン端子にテスターを当てる.(渋谷) 振動試験(IMV)前にも一応行い,振動試験(IMV)後に行う 構造の組み立てに影響されることがわかったので,最終組み立ての間にもちょくちょく行うことに ### 太陽電池貼り付け手順 植田,米山,もっさ 台形パネルの治具作成部未完 [太陽電池貼り付け(ひろがり)](https://www.dropbox.com/s/jy0gqxi6daplrth/%E5%A4%AA%E9%99%BD%E9%9B%BB%E6%B1%A0%E8%B2%BC%E3%82%8A%E4%BB%98%E3%81%91%28%E3%81%B2%E3%82%8D%E3%81%8C%E3%82%8A%29.docx?dl=0) ### 振動試験後の衛星管理 振動試験後に1か月程度衛星の様子を見る必要がある.(受け渡しは8月中旬) * 毎日衛星のバッテリ電圧を1時間確認する * バッテリ電圧が低下すると充電する(3.7V以上4V以下をキープする感じ) とりあえず振動試験(2回目)まで保留 振動試験(2回目)までは衛星のバッテリ電圧はみなさんで気にかけておく 8/4以降の分を様子をみてtonton回します. その後の担当者の決め方は要検討(曜日当番制?一週間ごとに割り振り?) ### バッテリの温度特性測定 藤田さん,渋谷さんが余ってるバッテリの一つを恒温槽で温度変化加えてる 菊水の充放電測定のやつで測定するので手の空いてる方はお手伝いしてください 環境試験室のちっちゃいPC,Anydeskで様子見れる 一回目は失敗 おそらく放電側の条件設定(CP固定で行った,セーフモード)でやったがうまくいかなかった(菊水の計測装置がエラーを起こした) 運用までには把握しておきたいが,優先順位は低い 使用しているバッテリは39番 進捗なし(07/24) ### 二回生の教育 * システムブロック図の理解 * 回路図の理解 * 上記に伴う電子機器の知識 [システム要求](https://drive.google.com/drive/folders/0BxAZ4DH7wtShM1NIdUtrUVhYQ28) [OPUSAT-KIT共有フォルダ](https://drive.google.com/open?id=0BwSDOahq_HpFfi1MTHpTdVpjbDNtOU5WV2Vjcmlpbi1uN0NFVFBPLXZmNUQ1cVFPUlU4MW8) [OPUSAT-KIT上位仕様](https://drive.google.com/drive/folders/0BxAZ4DH7wtShcXE2aDh4WVBnN0U?usp=sharing) [システムブロック図](https://www.dropbox.com/s/x0graq4yz5hdw3i/OP2%E9%9B%BB%E6%BA%90%E7%B3%BB%E3%82%B7%E3%82%B9%E3%83%86%E3%83%A0%E3%83%96%E3%83%AD%E3%83%83%E3%82%AF%E5%9B%B3_Ver0.1_ushio%E7%B7%A8%E9%9B%86.pptx?dl=0) [EPS1](https://www.dropbox.com/s/cdkc4h0qzmh9po0/%E5%9B%9E%E8%B7%AF%E5%9B%B3_OP2_EPS1_Ver3.34.pdf?dl=0) [EPS2](https://www.dropbox.com/s/g9v470lu9093s4o/OP2_EPS2_3.47.pdf?dl=0) [Mission](https://www.dropbox.com/s/ni9x21iffc57l78/OP2_Mission1_EPS_3.1.pdf?dl=0) [BOBC](https://www.dropbox.com/s/csyopdluh5u4gq9/BOBC1015.pdf?dl=0) ### 新二回生プロジェクト 消費電力と太陽電池の枚数について算出してみたので,確認して欲しい. 三人で計算した結果が割れてる. mbedとRaspberryPiを同時に使っているので消費電力かかりそう 一周期(90min)で5000mWh? 厳密なmWhじゃなくmW・(周期)と厳密なmWhの両方で計算し直す ### 藤田さんからの課題 藤田さんの作った電力収支問題を解いてみる  →時間がなくてできなかった,わからなかった まずは左端の時間と太陽電池の出力の関係図(cos^2のグラフ,周期はうまく設定して)から,横軸時間(min),縦軸全発生エネルギー(J,Wh,mWh)の図を描く 軌道は常に地球に同じ面を向けていていると仮定 <課題> 機器を使わずバッテリの電圧が3.4Vだとして、横軸時間tのグラフを書く バッテリ電圧,電流[mAh],電力[mWh]の時間変化を3つのグラフに示す [九州工業大学:衛星電力収支](https://kitsat.net/documents/shibagaki_part4.pdf) [構造案](https://docs.google.com/presentation/d/1bJPsX2XR45qYfs9cKPWov4P6O1s1J9_4QfXKo_neE9c/edit#slide=id.g874ae4fdb0_0_21) [衛星設計コンテスト一例](http://www.satcon.jp/history/prize23/pdf/idea_handaiin.pdf) # 太陽電池貼り付け [太陽電池貼り付け手順書](https://www.dropbox.com/s/lhn9buvic4nx2r5/%28OPUSAT%29%E5%A4%AA%E9%99%BD%E9%9B%BB%E6%B1%A0%E8%B2%BC%E3%82%8A%E4%BB%98%E3%81%91%E6%89%8B%E9%A0%86%E6%9B%B8Ver0.3.docx?dl=0) [太陽電池貼り付け関連フォルダリンク](https://www.dropbox.com/sh/s3uxk4lg376xmvv/AAC6D-lg96TIQzCXtr9gBB3ka?dl=0) # 新二回生プロジェクトリンク集 [バッテリ](https://www.dropbox.com/sh/1sftc3rrxl1ma25/AAAOn8BetcS1h3UnR-1Dka6Ka?dl=0) [太陽電池](https://www.dropbox.com/sh/2z4msgkcavls4cz/AAAYyI_D1e7PWjFufb_inNYQa?dl=0) [サクセスクライテリア](https://docs.google.com/document/d/1UGeQvJbHaJwyOKsAwVc6SNUIgydr92u8CjsMrm3ABIA/edit) [要求](https://app.balus.me/projects/5184355498459136/diagrams/5678522892812288) [WBS](https://docs.google.com/spreadsheets/d/1GbA5ebDEg7yUALkrcC4LLtOpiSBPLmKs86yZhOiUhcA/edit#gid=0) # 雑談 次回の会議はtonton回すので後日決定 CEESは九月に打ち上げあり バッテリ電圧は気にしておく 藤田さんから キョーミがあったら読んでください https://sssrc.slack.com/archives/C0NRM7FB9/p1594187790001900

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