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Small-Sized Variable Stiffness Actuator Module Based on Adjustable Moment Arm

가변 모멘트 암 기반의 소형 가변 강성 액추에이터 모듈

  • 유홍선 (고려대학교 메카트로닉스학과) ;
  • 송재복 (고려대학교 기계공학과)
  • Received : 2012.12.28
  • Accepted : 2013.08.21
  • Published : 2013.10.01

Abstract

In recent years, variable stiffness actuation has attracted much attention because interaction between a robot and the environment is increasingly required for various robot tasks. Several variable stiffness actuators (VSAs) have been developed; however, they find limited applications owing to their size and weight. For realizing their widespread use, we developed a compact and lightweight mini-VSA. The mini-VSA consists of a control module based on an adjustable moment arm mechanism and a drive module with two motors. By controlling the relative motion of cams in the control module, the position and stiffness can be simultaneously controlled. Experimental results are presented to show its ability to change stiffness.

최근에 들어 로봇과 환경 사이의 상호작용이 다양하게 발생하는 작업에서 가변 강성 액추에이터의 연구가 활발하다. 기존의 다양한 가변 강성 액추에이터가 개발되었지만 크기와 중량 때문에 응용분야를 찾기가 어렵다. 따라서 다양한 분야에 쉽게 이용되기 위해 소형의 가변 강성 액추에이터(miniVSA)를 개발하였다. miniVSA는 모멘트 암 기반의 강성제어 장치와 두 개의 모터로 구성된 구동 장치로 구성된다. 강성제어 장치는 두 캠의 상대 운동을 제어하여 위치와 강성을 동시에 제어할 수 있다. 이를 실험을 통하여 강성 변화를 검증하였다.

Keywords

References

  1. Tonietti, G., Schiavi, R. and Bicchi, A., 2006, "Optimal Mechanical/Control Design for Safe and Fast Robotics," Experimental Robotics IX: The 9th International Symposium on Experimental Robotics, volume 21, pp. 311-320.
  2. Wolf, S. and Hirzinger, G., 2008, "A New Variable Stiffness Design: Matching Requirements of the Next Robot Generation," IEEE International Conference on Robotics and Automation, pp.1741-1746.
  3. Pratt, G. A. and Williamson, M. M., 1995, "Series Elastic Actuators," IEEE International Conference on Intelligent Robots and Systems, pp. 399-406.
  4. Zinn, M., Khatib, O., Roth, B. and Salisbury, J. K., 2004, "Playing It Safe - A New Actuation Concept for Human-Friendly Robot Design," IEEE Robotics and Automation Magazine, Vol. 11, pp. 12-21.
  5. Hogan, N. and Buerger, S. P., 2005, "Impedance and Interaction Control," Robotics and Automation Handbook, New York, NY: CRC Press.
  6. Vanderborght, B., Tsagarakis, N., Semini, C., van Ham, R. and Caldwell, D., 2009, "MACCEPA 2.0: Adjustable Compliant Actuator with Stiffening Characteristic for Energy Efficient Hopping," in Proceedings of the IEEE International Conference on Robotics and Automation, pp.544-549.
  7. Schiavi, R., Grioli, G., Sen, S. and Bicchi, A., 2008 , "VSA-II: A Novel Prototype of Variable Stiffness Actuator for Safe and Performing Robots Interacting with Humans," in Proceedings of the IEEE International Conference on Robotics and Automation, pp.2171-2176.
  8. Choi, J., Hong, S., Lee, W., Kang, S. and Kim, M., 2011, "A Robot Joint with Variable Stiffness Using Leaf Springs," IEEE Transactions on Robotics, Vol. 27, No. 2, pp. 229-238. https://doi.org/10.1109/TRO.2010.2100450
  9. Kim, B. S. and Song, J. B., 2012, "Design and Control of a Variable Stiffness Actuator Based on Adjustable Moment Arm," IEEE Transactions on Robotics, Vol. 99, pp. 1-7.
  10. Jafari, A., Tsagarakis, N., Vanderborght, B. and Caldwell, D., 2010, "A Novel Actuator with Adjustable Stiffness (AwAS)," in Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems, pp.4201-4206.
  11. Jafari, A., Tsagarakis, N., Vanderborght, B. and Caldwell, D., 2011, "AwAS-II: A New Actuator with Adjustable Stiffness Based on the Novel Principle of Adaptable Pivot Point and Variable Lever Ratio," in Proceedings of the IEEE International Conference on Robotics and Automation, pp.4638-4643.
  12. Groothuis, S. S., Rusticelli, G., Zucchelli, A., Stramigioli, S. and Carloni, R., 2012, "The vsaUT-II: a Novel Rotational Variable Stiffness Actuator," in Proceedings of the IEEE International Conference on Robotics and Automation, pp.3355-3360.