Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Oscillating Flow on the Dynamic Behavior of an Artificial Sensory Hair

인공 감각모의 동적 거동에 미치는 진동유동의 영향

  • Park, Byung-Kyu (Institute of Advanced Machinery and Design, Seoul Nat'l Univ.) ;
  • Lee, Joon-Sik (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.)
  • 박병규 (서울대학교 정밀기계설계공동연구소) ;
  • 이준식 (서울대학교 기계항공공학부)
  • Received : 2011.05.26
  • Accepted : 2011.06.10
  • Published : 2011.08.01
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Abstract

Filiform hairs that respond to movements of the surrounding medium are the mechanoreceptors commonly found in arthropods and vertebrates. The hairs function as a sensory system for perceiving information produced by prey, predators, or conspecifics. A mathematical model is proposed, and the parametric analyses for the response of artificial filiform hair are conducted to design and predict the performance of a microfabricated device. The results for the Cytop hair, one of the most popular polymer optical fibers (POFs), show that the fundamental mode has a dominant effect on the hair behavior in an oscillating medium flow. The dynamic behavior of sensory hair is also dependent on the physical dimensions such as length and diameter. It is found that the artificial hair with a high elastic modulus does not show a resonance in the biologically important frequency range.

주위 매질의 움직임에 반응하는 섬유상 감각모는 대부분의 생물체에 존재하여 먹이, 침입자, 또는 동족 여부를 감지하는 역할을 한다. 이 기능을 모방한 인공 감각모를 설계 제작하기 위하여 유연 감각모를 기초로 한 수학모델을 제안하고, 작동영역에서의 응답특성을 파악하기 위하여 매개변수 해석을 수행하고 각 인자들의 영향을 고찰하였다. 유동 감각모의 변위를 일반화 좌표 및 고유 진동모드로 나타낸 결과, 탄성계수가 비교적 큰 Cytop 감각모의 경우 고유진동의 기본모드가 지배적인 것으로 나타났다. 주어진 유동 중에 있는 감각모의 동적거동은 형상에 크게 의존하였다. 또한 탄성계수가 큰 인공 감각모에서는 생물학적으로 중요한 주파수 범위 내에서 공진현상은 나타나지 않았다.

Keywords

References

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