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2004 年度 ARLISS 参加報告プレゼンテーション

2004 年度 ARLISS 参加報告プレゼンテーション. 三輪　章子. What is the ARLISS. A R ocket L aunch for I nternational S tudent’s S atellites. Payloads are made by students. About ten universities participate. Rockets are made and launched by a American amateur rocket group.

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2004 年度 ARLISS 参加報告プレゼンテーション

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  1. 2004年度ARLISS参加報告プレゼンテーション 三輪　章子

  2. What is the ARLISS ARocket Launch for International Student’s Satellites Payloads are made by students About ten universities participate Rockets are made and launched by a American amateur rocket group It is held at Black Rock desert, Nevada, U.S.A.

  3. ’04ARLISSPROJECTTOHOKUUNIVERSITYTEAM The Mission with the Dual Wheeled Rover Akiko Miwa Kosuke Sasahara Hiromitsu Watanabe

  4. Table of contents Introduction -- What is our purpose in ARLISS 2004 Mission sequence The design of a rover Summary of tests -- Vibration test, drop test The result of ARLISS 2004 Conclusion

  5. The payload is a Rover. Introduction We have challenged “Run -Back” approach since ARLISS 2002. Run - Back Advantages After landing … Unlimited time for moving is available. There is no big disturbance for the payload. Our Rovers 2002 2003 2004

  6. : The parachute was not open and the rover was • broken at landing. • : Due to the shock and vibration of the launch, • the GPS receiver was suspended. vibration test and drop test are necessary!! This year, our purposes are to develop 1. The technology of the vibration test and drop test. 2. Wheels with high locomotion capability. 3. Light body. 4. High communication ability.

  7. ② ④ ⑥ ⑤ ③ Mission sequence of “Run-back” ① Launch ② Separation from the Rocket (Autonomous sequence starts by switch) ③ Parachute Opens ④ Landing (Check by GPS data) ⑤ Separate the Parachute ⑥ Navigation Using GPS

  8. The design of our rover Material : CFRP and Aluminum Size : φ145 ×240 [mm] Weight : 1050 [g] Wheels are made from polyurethane

  9. Schematic diagram Radio system Navigation system Memory system

  10. Summary of tests Vibration test Test condition z vibration type : sine wave vibration direction : z direction

  11. All the electric circuit parts kept operating excellently. There were neither fall of parts nor a gap, etc. There were a disconnection of the power supply line and loosening of metal fittings.

  12. Drop test The carrier is given up to the high degree 30m by the balloon, and the payload is discharged. Diameter of balloon : 2.5 [m] Gas : Helium Examination frequency : twice

  13. The parachute opened both time. The rover didn’t have damage. When landing, the rover splashed on ground and rolled the string of the parachute.

  14. The result of ARLISS 2004 The launch was perfect, and the rover fell to a place near the goal!! The parachute was not open, again… But Circuit parts were not damaged → We could get GPS data by radio while it is falling, so the rover could be found easily. → After landing, MPU kept giving the control signal. CFRP body was not distorted and cracked Motors was broken. → The rover couldn’t move any more.

  15. Original driving performance of the rover Running in unleveled land Navigation running

  16. Conclusion We did vibration test for electric circuit parts, and circuit parts were not broken at the launch and the landing. The parachute did not open though we did the drop test. We should do more tests for the success. The utility of the use of materials such as CFRP and polyurethane in place of past aluminum was confirmed. The system with a higher communication ability than last year was able to be constructed.

  17. Data of fall 落下時GPS高度データ変化 落下速度 (Fall Speed) ：168 [km/h] 落下高度 (Fall Altitude) ：3300 [m] 落下時間 (Fall Time) ：1 [min]

  18. Data of fall 落下時GPS緯度・経度データ変化 水平方向への移動距離は数百ｍ程度 The movement to horizontal direction was about hundreds of meters.

  19. ARLISS全体の結果 制御に成功したチームは 一つもなかった 失敗の原因は？ 準備の遅れ →事前試験の提案 技術の伝達・習得不足 →技術資料の充実 試験の不足 →多種・多数の試験の実施

  20. 他チームのローバー 東大3年チーム 創価大チーム 目指せローバーコンペ開催。 東工大 高玉研チーム

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