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Efficiency analysis of telescopic-legged bipedal robots

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Abstract

This paper investigates the stability of underactuated bipedal walking incorporating telescopic-leg actuation. In human walking, knee joints of swing and support legs are bent and stretched. The telescopic legs mimic the motion of the center of mass of human legs via their telescopic motion during the stance phase. First, underactuated telescopic-legged biped robot models are introduced. Second, an output-following control law is applied to the linearized equation of motion of the robot, and the controlled robot’s equation is then specified as a linear time-varying system. The error transition equation is developed to evaluate the stability during the stance phase. Numerical calculations are performed to show the influences of leg telescopic motion on the stability.

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Acknowledgements

This research was partially supported by Grabt-in-Aid for Scientific Research (C) no. 16K06154, provided by the Japan Society for the Promotion of Science (JSPS).

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Authors and Affiliations

  1. Aichi Institute of Technology, 1247, Yachigusa, Yakusa-cho, Toyota, Aichi, 470-0392, Japan

    Yuji Harata

  2. Panasonic Smart Factory Solutions Co., Ltd., Osaka, Japan

    Yotaro Kato

  3. Japan Advanced Institute of Science and Technology, 1-1, Asahidai, Nomi, Ishikawa, 923-1292, Japan

    Fumihiko Asano

Authors
  1. Yuji Harata
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  2. Yotaro Kato
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  3. Fumihiko Asano
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Corresponding author

Correspondence to Yuji Harata.

Additional information

This work was presented in part at the 2nd International Symposium on Swarm Behavior and Bio-Inspired Robotics, Kyoto, October 29–November 1, 2017.

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Harata, Y., Kato, Y. & Asano, F. Efficiency analysis of telescopic-legged bipedal robots. Artif Life Robotics 23, 585–592 (2018). https://doi.org/10.1007/s10015-018-0492-4

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  • DOI: https://doi.org/10.1007/s10015-018-0492-4

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