Journal of the Korean Society for Aeronautical & Space Sciences (한국항공우주학회지)

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Characteristic of an insect-mimicking flapping device actuated by a piezoceramic actuator

압축하중을 받는 압전 작동기로 구동하는 곤충모방 날갯짓 기구의 특성

  • 박훈철 (건국대학교 신기술융합학과) ;
  • 구옌쿠옥비엣 (건국대학교 신기술융합학과 대학원) ;
  • 변도영 (건국대학교 항공우주정보시스템공학과) ;
  • 구남서 (건국대학교 신기술융합학과) ;
  • 윤광준 (건국대학교 항공우주정보시스템공학과)
  • Published : 2008.11.04
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Abstract

A piezoceramic unimoph actuator can produce a relatively larger actuation force and actuation displacement when a proper compressive load is applied during operation, because the compressive stress causes material nonlinear behavior in the piezoceramic layer and triggers mechanical buckling. In this paper, we examined effects of the actuator under compression on the flapping angle and aerodynamic force generation capability. Effects of wing shape and passive wing rotation angle on the aerodynamic force production were also investigated. The average vertical force acquired by a 2D CFD simulation for an artificial wing showed a good agreement with the measured one by the experiment.

단일층 압전작동기에 적절한 압축하중을 가하면, 압전세라믹 층에 가해지는 압축 응력에 의한 재료비선형적 특성과 기계적 좌굴현상에 의하여 작동 변위와 작동력이 동시에 향상된다. 본 논문에서는 날갯짓 기구를 압축하중을 받는 단일층 압전 작동기로 구동하는 경우, 날갯짓 각도와 공기력에 어떠한 영향이 발생하는가를 조사하였다. 또한 날개 형상과 수동 날갯 회전 각도가 공기력 발생에 미치는 영향도 실험적으로 조사하였다. 인공 날개를 2차원으로 가정한 전산유체해석을 통하여 얻은 평균 수직력이, 실험으로 얻은 값과 잘 일치함을 확인하였다.

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References

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