International Applied Mechanics

, Volume 44, Issue 7, pp 830–837 | Cite as

Treadmill walking of the pneumatic biped Lucy: Walking at different speeds and step-lengths

  • B. Vanderborght
  • B. Verrelst
  • R. Van Ham
  • M. Van Damme
  • R. Versluys
  • D. Lefeber
Article

Abstract

Actuators with adaptable compliance are gaining interest in the field of legged robotics due to their capability to store motion energy and to exploit the natural dynamics of the system to reduce energy consumption while walking and running. To perform research on compliant actuators we have built the planar biped Lucy. The robot has six actuated joints, the ankle, knee and hip of both legs with each joint powered by two pleated pneumatic artificial muscles in an antagonistic setup. This makes it possible to control both the torque and the stiffness of the joint. Such compliant actuators are used in passive walkers to overcome friction when walking over level ground and to improve stability. Typically, this kind of robots is only designed to walk with a constant walking speed and step-length, determined by the mechanical design of the mechanism and the properties of the ground. In this paper, we show that by an appropriate control, the robot Lucy is able to walk at different speeds and step-lengths and that adding and releasing weights does not affect the stability of the robot. To perform these experiments, an automated treadmill was built

Keywords

bipedal walking robot pneumatic artificial muscle 

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References

  1. 1.
    R. Regele, PRO-ROBOT: Paving the Road for Humanoid Robots, Deliverable 2.2: Socio-economic Analysis on Humanoid Robots, August (2003).Google Scholar
  2. 2.
    M. Hirose, Y. Haikawa, T. Takenaka, and K. Hirai, “Development of humanoid robot ASIMO,” in: Proc. IEEE/RSJ Int. Conf. on Intelligent Robots and Systems (2001).Google Scholar
  3. 3.
    Y. Kuroki, T. Ishida, J. Yamagushi, M. Fujita, and T. Doi, “A small biped entertainment robot,” in: Proc. IEEE/RAS Int. Conf. on Humanoid Robots (2001), pp. 184–186.Google Scholar
  4. 4.
    K. Yokoi et al., “Humanoid robot's applications in HRP,” in: Proc. IEEE Inter. Conf. on Humanoid Robots, Karlsruhe, Germany (2003).Google Scholar
  5. 5.
    V. B. Larin and V. M. Matiyasevich, “A note on model hopping machine,” Int. Appl. Mech., 38, No. 10, 1272–1280 (2002).CrossRefGoogle Scholar
  6. 6.
    V. B. Larin and V. M. Matiyasevich, “A control algorithm for a 3d hopping machine,” Int. Appl. Mech., 40, No. 4, 462–470 (2004).CrossRefMathSciNetGoogle Scholar
  7. 7.
    V. B. Larin, “A 3D model of one-legged hopping machine,” Int. Appl. Mech., 40, No. 4, 583–591 (2004).CrossRefGoogle Scholar
  8. 8.
    V. B. Larin, “A note on a walking machine model,” Int. Appl. Mech., 39, No. 4, 484–492 (2003).CrossRefMathSciNetGoogle Scholar
  9. 9.
    V. B. Larin, “On static output-feedback stabilization of a periodic system,” Int. Appl. Mech., 42, No. 3, 357–363 (2006).CrossRefGoogle Scholar
  10. 10.
    V. B. Larin and A. A. Tunik, “Dynamic output-feedback compensation of external disturbances,” Int. Appl. Mech., 42, No. 5, 606–616 (2006).CrossRefMathSciNetGoogle Scholar
  11. 11.
    T. V. Zavrazhina, “Control of the spatial motions of a gantri manipulator with elastic links,” Int. Appl. Mech., 42, No. 2, 228–234 (2006).CrossRefMathSciNetGoogle Scholar
  12. 12.
    T. V. Zavrazhina, “Influence of the flexibility of links on the dynamics of a multilink robot manipulator,” Int. Appl. Mech., 43, No. 5, 577–585 (2007).CrossRefGoogle Scholar
  13. 13.
    S. H. Collins, A. Ruina, R. Tedrake, and M. Wisse, “Efficient bipedal robots based on passive-dynamic walkers,” Science, February, 18, No. 2, 1082–1085 (2005).CrossRefADSGoogle Scholar
  14. 14.
    B. Verrelst, J. Vermeulen, B. Vanderborght, R. Van Ham, J. Naudet, D. Lefeber, F. Daerden, and M. Van Damme, “Motion generation and control for the pneumatic biped Lucy,” Int. J. Humanoid Robotics (IJHR), 25, No. 4, 343–358 (2006).Google Scholar
  15. 15.
    F. Daerden and D. Lefeber, “The concept and design of pleated pneumatic artificial muscles,” Int. J. Fluid Power, 2, No. 3, 41–50 (2001).Google Scholar
  16. 16.
    C. E. Bauby and A. D. Kuo, “Active control of lateral balance in human walking,” J. Biomechanics, 33, 1433–1440 (2000).CrossRefGoogle Scholar
  17. 17.
    E. Westervelt, J. Grizzle, and D. Koditschek, “Hybrid zero dynamics of planar biped walkers,” IEEE Trans. on Automatic Control, 33, 42–56 (2000).MathSciNetGoogle Scholar
  18. 18.
    C.-L. Shih and W. Gruver, “Control of a biped robot in the double-support phase,” IEEE Trans. on Systems, Man and Cybernetics, 22, No. 4, 729–735 (1992).MATHCrossRefGoogle Scholar
  19. 19.
    B. Verrelst, R. Van Ham, B. Vanderborght, J. Vermeulen, D. Lefeber, and F. Daerden, “Exploiting adaptable passive behaviour to influence natural dynamics applied to legged robots,” Robotica, 23, No. 2, 149–158 (2005).CrossRefGoogle Scholar
  20. 20.
    R. Van Ham, F. Daerden, B. Verrelst, D. Lefeber, and J. Vandenhoudt, “Control of pneumatic artificial muscles with enhanced speed up circuitry,” in: Proc. 5th Int. Confer. on Climbing and Walking Robots and the Support Technologies for Mobile Machines, September (2002), pp. 195–202.Google Scholar
  21. 21.
    B. Vanderborght, B. Verrelst, R. V. Ham, and D. Lefeber, “Controlling a bipedal walking robot actuated by pleated pneumatic artificial muscles,” Robotica, Issue 04, 401–410 (2006).Google Scholar
  22. 22.
    M. Vukobratovic and B. Borovac, “Note on the article ‘Zero moment point: Thirty five years of its life',” Int. J. Humanoid Robotics, 2, No. 2, 1–3 (2005).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2008

Authors and Affiliations

  • B. Vanderborght
    • 1
    • 2
  • B. Verrelst
    • 1
    • 2
  • R. Van Ham
    • 1
    • 2
  • M. Van Damme
    • 1
    • 2
  • R. Versluys
    • 1
    • 2
  • D. Lefeber
    • 1
    • 2
  1. 1.Department of Mechanical EngineeringVrije Universiteit BrusselBrusslesBelgium
  2. 2.Italian Instutute of Techology, Robotics, Brain and Cognitive SciencesGenoaItaly

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