REPORT

2019 Spring Semester Flying Robot Project Team F Article 2May 08, 2019

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At the 2nd meeting, four main works were proceeded which were including design, research and discussion.

- Research for selecting Motor
We checked out the data sheet which shows various specs of motors, and selected the best one which matched the voltage, throttle and thrust valid to our rough calculation. Better condition are lower throttle and larger thrust at the same level of voltage.

- Consideration of Airfoil Design
Our flying-robot is designed to have larger wings because it will fly very slow. We thought carefully about the design around propellers, from the view point of aerodynamics.

- Design of CG-Shifting Device
It is necessary to move the CG of our flying-robot a few centimeters ahead because total moments in the pitch direction is needed to balance when the robot ascends. So we designed a simple system with a servo and wire, which can move the battery back and forth and change the center of gravity of the whole aircraft.

- List up of what to buy
We chose some parts referring to regular flying-robot and selected other parts with serious consideration on our own. For example, the two motors which are more efficient and have higher performance, CG-shifting device which can change the CF of the flying-robot by moving a battery back and forth, and so on.

Finally, we decided what to prepare for next meeting, CAD data of airfoil design and final decision of what to buy for making our own flying-robot, consideration of mechanics in CG-shifting device more deeply. 第2回のミーティングでは、設計・調査・議論を含め主に4つの作業を行った。

ーモーターの選定
業者のサイトにある製品情報を調べて、電圧や推力が適正かを設計概要に従って判断した。

ー翼型の検討
速度が遅いため、翼面積は大きな設計にした。翼の内部にプロペラが含まれる構造であるため、その周辺の設計について検討を行った。

ー重心変更装置の設計
上昇時にはピッチ方向モーメントを釣り合わせるため、飛行時よりも重心を前方にする必要がある。サーボ・ワイヤを用いたシンプルな機構によってバッテリーを前後に動かし、全体の重心操作を実現する設計とした。

ー必要な物品のリストアップ
普通の部品はオーソドックスな機体を参考にしつつ、独自の部品については改めて検討を重ねてから選定した。

最後に、次回のミーティングまでに用意すべき物・事について決めた。

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