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A dynamic gait stabilization algorithm for quadrupedal locomotion through contact time modulation

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Abstract

In this paper, we propose a stabilization method for dynamic gaits of quadrupedal walking robots covering a wide range of speeds and various types of gait. Our stabilization method is based on adjusting the contact time between the four legs and ground. By modulating the contact time, the impact applied to the body can be controlled and stabilized. The stability provided by the proposed algorithm was proved in the sense of Lyapunov. The proposed algorithm also demonstrated robust performance under large external disturbances, and the performance was compared with other algorithms through simulations. Simulation results of bounding gaits under different ground conditions were compared, and the various types of stable gait implemented by the proposed algorithm are also presented.

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Acknowledgements

This work was supported by the 2021 Research Fund (1.210052.01) of UNIST (Ulsan National Institute of Science and Technology), and the National Research Foundation of Korea (NRF) Grant funded by the Korean Government (MSIT) (No. NRF-2019R1A2C2084677).

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  1. Department of Mechanical Engineering, Ulsan National Institute of Science and Technology, Ulsan, 44919, Korea

    Hoyeon Yeom & Joonbum Bae

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  1. Hoyeon Yeom
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Correspondence to Joonbum Bae.

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Yeom, H., Bae, J. A dynamic gait stabilization algorithm for quadrupedal locomotion through contact time modulation. Nonlinear Dyn 104, 2275–2289 (2021). https://doi.org/10.1007/s11071-021-06376-5

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