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Shock-Absorbing Safety Mechanism Based on Transmission Angle of a 4-Bar Linkage

4절링크의 전달각에 기초한 충격흡수식 안전기구

  • 박정준 (고려대학교 기계공학과) ;
  • 김병상 (고려대학교 기계공학과) ;
  • 송재복 (고려대학교 기계공학과)
  • Published : 2005.11.01

Abstract

Unlike industrial manipulators, the manipulators mounted on service robots are interacting with humans in various aspects. Therefore, safety has been one of the most important design issues. Many compliant robot arms have been introduced for safety. It is known that passive compliance method has faster response and higher reliability than active ones. In this paper, a new safety mechanism based on passive compliance is proposed. Passive mechanical elements, specifically transmission angle of the 4-bar linkage, springs and shock absorbing modules are incorporated into this safety mechanism. This mechanism works only when the robot arm exerts contact force much more than the human pain tolerance. Validity of this mechanism is verified by simulations and experiments. It is shown that the manipulator using this mechanism provides higher performance and safety than those using other passive compliance mechanisms or active methods.

Keywords

Safety Mechanism;Transmission angle;Passive Compliance;Manipulator

References

  1. Laurin-Kovitz, K.F. and Colgate, J. E., 1991, 'Design of Components for Programmable Passive Impedance,' Proc. of the IEEE International Conference on Robotics and Automation, pp. 1476-1481 https://doi.org/10.1109/ROBOT.1991.131824
  2. Morita, T. and Sugano, S., 1995, 'Development of One-D.O.F. Robot Arm Equipped with Mechanical Impedance Adjuster,' Proc. of the IEEE/RSJ International Conference on Intelligent Robots and System, pp. 407- 412 https://doi.org/10.1109/IROS.1995.525828
  3. Okada, M., Nakamura, Y. and Ban, S., 2001, Design of Programmable Passive Compliance Shoulder Mechanism,' Proc. of the IEEE International Conference on Robotics and Automation, pp. 348- 353 https://doi.org/10.1109/ROBOT.2001.932576
  4. Kang S. and Kim, M., 2002, 'Safe Arm Design for Service Robot,' Proc. of the International Conference on Control, Automation and System, pp. 88- 95
  5. Wilson, Charles E. and Sadler, J. Peter, 1993, Kinematics and Dynamics of Machinery, Second Edition
  6. Stephen H. Crandall and Norman C. Dahl, 1978, An Introduction to The Mechanics of Solids,' Second edition
  7. Yamada, Y., Hirasawa, Y, Huang, S.Y. and Umetani, Y., 1996, 'Fail-Safe Human/Robot Contact in the Safety Space,' IEEE International Workshop on Robot and Human Communication, pp. 59-64 https://doi.org/10.1109/ROMAN.1996.568748
  8. Yamada, Y, Suita, K., Imai, K., Ikeda, H. and Sugimoto, N., 1997, 'Human-Robot Contact in the Safeguarding Space,' IEEE/ASME Transactions on Mechatronics, Vol. 2, No. 4, pp. 230- 236 https://doi.org/10.1109/3516.653047

Cited by

  1. Development of a Safe Manipulator for Positioning a Kiosk Panel vol.36, pp.1, 2012, https://doi.org/10.3795/KSME-A.2012.36.1.073