IPMC 작동기로 구동되는 초소형 비행체 날개의 공기흐름 조절용 ZNMF(zero-net-mass-flux) 펌프의 예비설계 및 해석

국문 초록 (Abstract)

본 논문은 초소형 비행체 날개 주위의 공기흐름 조절을 위한 IPMC 작동기로 구동되는 ZNMF 펌프의 체계적인 설계 및 해석 기법을 소개한다. IPMC는 낮은 인가전압에서 큰 굽힘 변위를 발생시키며, 공기 중에서도 작동이 가능하고, 작은 크기로 손쉽게 제작할 수 있기 때문에 소형 펌프의 작동 막으로 매우 적합한 재료이다. 본 연구에서는 수치해석 기법을 이용하여 최대 작동 체적을 발생시키는 IPMC 작동 막의 최적 형상을 찾고, 이러한 최적형상에 기초하여 슬롯을 갖는 ZNMF 펌프를 설계하였다. 이후 초소형 비행체의 비행속도, 펌프 작동 막의 구동 주파수(~ 40 ㎐), 슬롯을 통과하는 공기의 속도 등을 이용하여 무차원화 된 진동수와 모멘텀 계수를 구하였고, 설계된 ZNMF 펌프가 초소형 비행체 날개의 공기흐름 조절에 적용이 가능함을 보였다.

다국어 초록 (Multilingual Abstract)

In this paper, a systematic design method on an IPMC(ionic polymer-metal composite)-driven ZNMF(zero-net-mass-flux) pump is introduced for the flow control of an MAV′s (micro air vehicle) wing. Since the IPMC is able to generate a large deformation under a low input voltage along with its ability to operate in air, and is easier to be manufactured in a small size, it is considered to be an ideal material of the actuating diaphragm. Through the numerical methods, an optimal shape of the IPMC diaphragm was found for maximizing the stroke volume. Based on the optimal IPMC diaphragm, a proto-type ZNMF pump with a slot, was designed. By using the flight speed of the MAV considered in this work, the driving frequencies(~ 40 ㎐) of IPMC diaphragm, and the flow velocity through the pump′s slot, the calculated non-dimensional frequency and the momentum coefficient ensure the feasibility of the designed ZNMF pump as a flow control device.

목차 (Table of Contents)

• ABSTRACT
• 초록
• Ⅰ. 서론
• Ⅱ. IPMC 작동막의 설계
• Ⅲ. IPMC 구동 ZNMF 펌프
• Ⅳ. 결론
• 후기
• 참고문헌

참고문헌 (Reference)

1 "압전 작동기 LIPCA를 이용한 형상가변익 설계 및 작동구현" 31 (31): 34-39, 2003.

2 "등가 보 및 등가 바이모프보를 이용한 IPMC 작동기 모델링" 10 (10): 1012-1016, 2004.

3 "high-power synthetic jet actuators for flow separation control" 2001

4 "Water uptake and migration effects of electroactive IPMC actuator" 118 : 98-106, 2005

5 "The interaction between a compressible synthetic jet and a laminar hypersonic boundary layer" 66 : 1-21, 2001

6 "Solid-state polymeric sensors, transducers, and actuators" 2002

7 "Oscillatory excitation of unsteady compressible flows over airfoils at flight Reynolds numbers" 1999.

8 "Oscillatory control of separation at high Reynolds numbers" 37 : 1062-1071, 1999

9 "Numerical study of high-lift flow with separation control by periodic excitation" 2001.

10 "Numerical simulation of boundary-layer control using MEMS actuation" the university of warwick 2001

11 "Non-linear finite element modeling of THUNDER piezoelectric actuators" 1999.

12 "MSC/NASTRAN user's manual" 2001.

13 "Linear electromechanical model of ionic polymer transducers - Part II" 14 : 343-357, 2003

14 "Linear electromechanical model of ionic polymer transducers - Part I" 14 : 333-342, 2003

15 "Ionic polymer-metal composites: Ⅱ. Manufacturing techniques" 12 : 65-79, 2003

16 "Ionic polymer-metal composites: Ⅰ. Fundamentals" 10 : 819-833, 2001

17 "Ionic liquids as stable solvents for ionic polymer transducers" 115 : 79-90, 2004.

18 "III. Modeling and simulation as biomimetic sensors actuators, transducers, and artificial muscles" 13 : 1362-1388, 2004

19 "Electromechanical response of ionic polymer-metal composites" 87 : 3321-3331, 2000

20 "Electromechanical flapping produced by ionic polymer-metal composites" 2004

21 "Design and flight test of a fixed wing MAV" 2002

22 "Active flow control technology" 2000.

23 "A piezoelectrically actuated micro synthetic jet for active flow control" 108 : 168-174, 2003