High-speed bounding with the MIT Cheetah 2: Control design and experiments
Name
Bounding-IJRR-Park-Wensing-Kim.pdf
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2.48 MB
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Author(s)
Park, Hae-Won
Wensing, Patrick M.
Kim, Sangbae
Date Issued
February 2017
Journal
The International Journal of Robotics Research
Publisher
SAGE Publications
Citation
Park, Hae-Won, Patrick M Wensing, and Sangbae Kim. “High-Speed Bounding with the MIT Cheetah 2: Control Design and Experiments.” The International Journal of Robotics Research 36, no. 2 (February 2017): 167–192. © 2017 The Authors
Version
Author's final manuscript
Abstract
This paper presents the design and implementation of a bounding controller for the MIT Cheetah 2 and its experimental results. The paper introduces the architecture of the controller along with the functional roles of its subcomponents. The application of impulse scaling provides feedforward force profiles that automatically adapt across a wide range of speeds. A discrete gait pattern stabilizer maintains the footfall sequence and timing. Continuous feedback is layered to manage balance during the stance phase. Stable hybrid limit cycles are exhibited in simulation using simplified models, and are further validated in untethered three-dimensional bounding experiments. Experiments are conducted both indoors and outdoors on various man-made and natural terrains. The control framework is shown to provide stable bounding in the hardware, at speeds of up to 6.4 m/s and with a minimum total cost of transport of 0.47. These results are unprecedented accomplishments in terms of efficiency and speed in untethered experimental quadruped machines. Keywords: Legged Robots, Motion Control, Biologically-Inspired Robots, Dynamics
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1177/0278364917694244
