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Control of a Quadruped Robot with Bionic Springy Legs in Trotting Gait

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Abstract

Legged robots have better performance on discontinuous terrain than that of wheeled robots. However, the dynamic trotting and balance control of a quadruped robot is still a challenging problem, especially when the robot has multi-joint legs. This paper presents a three-dimensional model of a quadruped robot which has 6 Degrees of Freedom (DOF) on torso and 5 DOF on each leg. On the basis of the Spring-Loaded Inverted Pendulum (SLIP) model, body control algorithm is discussed in the first place to figure out how legs work in 3D trotting. Then, motivated by the principle of joint function separation and introducing certain biological characteristics, two joint coordination approaches are developed to produce the trot and provide balance. The robot reaches the highest speed of 2.0 m·s−1, and keeps balance under 250 Kg·m·s−1 lateral disturbance in the simulations. The effectiveness of these approaches is also verified on a prototype robot which runs to 0.83 m·s−1 on the treadmill. The simulations and experiments show that legged robots have good biological properties, such as the ground reaction force, and spring-like leg behavior.

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Authors and Affiliations

  1. State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin, 150001, P. R. China

    Mantian Li, Zhenyu Jiang, Pengfei Wang & Lining Sun

  2. Institute of Intelligent Systems and Information Technology, University of Electronic Science and Technology of China, Chengdu, 610000, P. R. China

    Shuzhi Sam Ge

  3. Department of Electrical and Computer Engineering, the National University of Singapore, 117576, Singapore, Singapore

    Shuzhi Sam Ge

Authors
  1. Mantian Li
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  2. Zhenyu Jiang
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  3. Pengfei Wang
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  4. Lining Sun
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  5. Shuzhi Sam Ge
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Corresponding author

Correspondence to Pengfei Wang.

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Li, M., Jiang, Z., Wang, P. et al. Control of a Quadruped Robot with Bionic Springy Legs in Trotting Gait. J Bionic Eng 11, 188–198 (2014). https://doi.org/10.1016/S1672-6529(14)60043-3

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  • DOI: https://doi.org/10.1016/S1672-6529(14)60043-3

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