Dynamic Stability Measurement of Mars Entry Capsule Using Magnetic Suspension Balance System

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  • TAKAHASHI Tomoya
    連絡先著者（Corresponding author）：hemptom@akane.waseda. jp 早稲田大学大学院基幹理工学研究科機械科学専攻
  • SUGIURA Hiroki
    国立研究開発法人宇宙航空研究開発機構航空技術部門
  • WATANABE Reina
    電気通信大学大学院情報理工学研究科知能機械工学専攻
  • ANDO Ryu
    電気通信大学大学院情報理工学研究科知能機械工学専攻
  • MIYAZAKI Takeshi
    電気通信大学大学院情報理工学研究科知能機械工学専攻
  • TEZUKA Asei
    早稲田大学理工学術院機械科学・航空学科

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Other Title
  • 磁力支持を用いた火星探査カプセルの動安定計測
  • ジリョク シジ オ モチイタ カセイ タンサ カプセル ノ ドウ アンテイ ケイソク

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Description

Almost all re-entry capsules such as HAYABUSA re-entry capsule are dynamically unstable in transonic region. We researched dynamic stability characteristics of Mars entry capsule (70º sphere-cone capsule model) at low speed. In order to avoid significant sting interference, the tests were conducted using magnetic suspension balance system (MSBS). Angle of attack and Reynolds number effects on drag coefficients were measured. Dynamic stability derivatives were measured by forced oscillation method. Drag coefficients were barely affected by Reynolds number and angle of attack. The dynamic stability derivatives of Mars entry capsule were small negative value. These results showed that Mars entry capsule was slightly dynamically unstable.

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