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Behavior of a Shape Memory Alloy Actuator with Composite Strip and Spring

복합재료 스트립과 스프링을 갖는 형상기억합금 작동기의 거동

  • 허석 (건국대학교 인공근육연구센터) ;
  • 황도연 (건국대학교 인공근육연구센터) ;
  • 최재원 (수원대학교 공학교육혁신센터) ;
  • 박훈철 (건국대학교 신기술융합학과) ;
  • 구남서 (건국대학교 신기술융합학과)
  • Published : 2009.04.30

Abstract

This paper presents an experimental approach to design a bending-type actuator by using a shape memory alloy wire (SMA), composite strip, and spring. The SMA wire is attached to two edges of the bent strip to apply pre-stress to the SMA wire. The spring is used to provide recovery force right after actuation of the SMA wire. To investigate thermo-mechanical characteristics of the SMA wire, a series of DSC tests have been conducted and tensile tests under various levels of pre-stress and input power have been performed. Based on the measured properties of the SMA wire, bending-type actuators are designed and tested for different combination of strip, number of springs, and input power. It has been found that a bending-type actuator with a proper combination shows fast actuation performance and low power consumption.

이 논문은 형상기억합금 선재를 이용한 굽힘 작동기의 실험적인 설계방법을 다루고 있다. 제안된 굽힘 작동기는 유리섬유 프리프레그를 이용하여 만든 스트립, 스프링 그리고 형상기억합금 선재로 구성된다. 굽힘 작동기에서 스트립은 초기에 형상기억합금 선재에 초기하중을 가하기 위하여 굽힘 형태로 정되며, 스프링은 형상기억합금 선재가 작동 후 빠른 시간내에 초기 형상으로 돌아오기 위한 보조수단으로 사용된다. 먼저 형상기억합금 선재의 특성을 알아보기 위하여 시차주사열량계(DSC)를 이용한 실험, 여러 종류의 초기 하중을 가한 후 작동 성능 실험, 인장 시험, 온도 변화에 따른 기계적 거동을 조사하였다 이를 바탕으로 스트립, 스프링, 인가 전압에 의한 영향을 관찰하고 소모전력을 분석하여 굽힘 작동기를 설계하였다. 특정 조건을 갖는 굽힘 작동기는 낮은 소모전력으로 빠른 응답성능을 나다내었다.

Keywords

References

  1. Ikuta K., "Micro/miniature shape memory alloy actuator," Proceedings of Robotics and Automation, Vol. 3, 1990, pp. 2156-2161
  2. Reynaerts D., and Van Brussel H., "Design aspects of shape memory actuators," Mechatronics, Vol. 8 No. 6, 1998, pp. 635-656 https://doi.org/10.1016/S0957-4158(98)00023-3
  3. Huang W., "On the selection of shape memory alloys for actuators," Materials and Design, Vol. 23, No. 1, 2002, pp. 11-19 https://doi.org/10.1016/S0261-3069(01)00039-5
  4. Fukuda T., Hosokai H., and Kikuchi I., "Distributed type of actuators by shape memory alloy and its application to underwater mobile robotic mechanism," Proceedings of Robotics and Automation, Vol. 2, 1990, pp. 1316-1321
  5. Brinson L.C., and Huang M.S., "Simplification and comparisons of shape memory alloy constitutive models," Journal ol Intelligent Material Systems and Structures, Vol. 7, No. 1, 1996, pp. 108-114 https://doi.org/10.1177/1045389X9600700112
  6. Tanaka K. A., "A thermomechanical sketch of shape memory effect: one dimensional tensile behavior," Res Mech, Vol. 18, 1986, pp. 251-263
  7. Liang C., and Rogers C. A., "One-dimensionalthermomechancal constitutive relations for shape memory materials," Journal ol Intelligent Material Systems and Structures, Vol. 1, No. 2, 1990, pp. 207-234 https://doi.org/10.1177/1045389X9000100205
  8. Brinson L. C., "One dimensional constitutive behavior of shape memory alloys: thermomechanical derivation with non-constant material functions," Journal of Intelligent Material Systems and Structures, Vol. 4, No. 2, 1993, pp. 229-242 https://doi.org/10.1177/1045389X9300400213
  9. Zak A.J., Cartmell M. P., Ostachowicz W. M., and Wiercigroch M., "One-dimensional shape memory alloy models for use with reinforced composite structures," Smart Materials and Structures, Vol. 12, 2003, pp. 338-346 https://doi.org/10.1088/0964-1726/12/3/304
  10. Dutta S., Ghorbel F., and Dabney J., "Modeling and control of a shape memory alloy actuator," Proceedings of the 2005 lEEE International Symposium on Mediterrean Conference on Control and Automation, 2005, pp. 1007-1012
  11. Shu S.G., Lagoudas D.C., Hughes D., and Wen J.T., "Modeling of a flexible beam actuated by shape memory alloy wires," Smart Materials and Structures, Vol. 6, 1997, pp. 265-277 https://doi.org/10.1088/0964-1726/6/3/005
  12. 양승만, 노진호, 한재흥, 이인, "형상기억합금 작동기를 이용한 복합재 보의 능동형상제어", 한국복합재료학회지, 제17권 제4호, 2004, pp. 18-24
  13. Janocha J., "Adaptronics and Smart Structures: basics, materials, design, and applications," Springer, Berlin, 1999, pp. 143-160