Abstract
We have built a planar one-legged robot to study the design, actuation, control and analysis of autonomous dynamically stable legged robots. Our 15kg robot is powered by two low power 80W DC electric motors, yet it operates in a stable and robust fashion and currently achieves a top running speed of 1.2m/s. Both design and control borrow heavily from Raibert's work whose robots are actuated by powerful hydraulic actuators. Surprisingly, even with our drastically reduced power available for actuation, only the hopping height controller had to be modified to achieve stable running. As a basis for further improvements we introduce a scalar “locomotion time” variable, which maps one locomotion cycle onto a fixed interval, independent of operating conditions. A dynamical model and a computer simulation have been developed which accurately predict the robot's behavior.
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References
R. McN. Alexander. Three Uses for Springs in Legged Locomotion. Int. J. Robotics Research, 9(2), 1990.
R. McN. Alexander, N. J. Dimery, and R. F. Ker. Elastic Structures in the back and their role in galloping in some mammals. J. Zoology (London), 207, 1985.
R. McN. Alexander and A. Vernon. The mechanics of hopping by kangaroos. J. Zoology (London), 177, 1975.
M. Buehler, D. E. Koditschek, and P. J. Kindlmann. Planning and Control of Robotic Juggling and Catching Tasks. Int. J. Robotics Research, (accepted: 17. Dec. 91).
K. Matsuoka. A mechanical model of repetitive hopping movements. Biomechanisms, 5:251–258, 1980.
T. McGeer. Passive dynamic walking. Int. J. Robotics Research, 9(2), 1990.
H. Miura and I. Shimoyama. Dynamic walk of a biped. Int. J. Robotics Research, 3:60–74, 1984.
K. V. Papantoniou. Control architecture for an electrical, actively balanced multi-leg robot, based on experiments with a planar one leg machine. In Proc. Int. Fed. Automatic Control, pages 283–290, Vienna, Austria, 1991.
K. V. Papantoniou. Electromechanical design of an actively balanced one leg electrically powered robot. In Proc. IEEE Conf. Intelligent Systems and Robots, Osaka, Japan, 1991.
H. Rad, P. Gregorio, and M. Buehler. Design, modeling and control of a hopping robot. In Proc. IEEE/RSJ Conf. Intelligent Systems and Robots, Yokohama, Japan, Jul 1993.
M. H. Raibert. Dynamic stability and resonance in a one-legged hopping machine. 4th Symp. Theory and Practice of Robots and Manipulators, 1981.
M. H. Raibert. Legged Robots That Balance. MIT Press, Cambridge, MA, 1986.
M. H. Raibert. Legged robots. In P. H. Winston and S. A. Shellard, editors, Artificial Intelligence at MIT, pages 149–179. MIT Press, Cambridge, MA, 1990.
M. H. Raibert and C. M. Thompson. Passive dynamic running. In V. Hayward and O. Khatib, editors, Experimental Robotics I, pages 74–83. Springer-Verlag, NY, 1989.
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© 1994 Springer-Verlag London Limited
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Gregorio, P., Ahmadi, M., Buehler, M. (1994). Experiments with an electrically actuated planar hopping robot. In: Yoshikawa, T., Miyazaki, F. (eds) Experimental Robotics III. Lecture Notes in Control and Information Sciences, vol 200. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0027601
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DOI: https://doi.org/10.1007/BFb0027601
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