Xiong, Xiaobin and Reher, Jenna and Ames, Aaron D. (2021) Global Position Control on Underactuated Bipedal Robots: Step-to-step Dynamics Approximation for Step Planning. In: 2021 IEEE International Conference on Robotics and Automation (ICRA). IEEE , Piscataway, NJ, pp. 2825-2831. ISBN 978-1-7281-9077-8. https://resolver.caltech.edu/CaltechAUTHORS:20211217-96491000
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Abstract
Global position control for underactuated bipedal walking is a challenging problem due to the lack of actuation on the feet of the robots. In this paper, we apply the Hybrid-Linear Inverted Pendulum (H-LIP) based stepping on 3D underactuated bipedal robots for global position control. The step-to-step (S2S) dynamics of the H-LIP walking approximates the actual S2S dynamics of the walking of the robot, where the step size is considered as the input. Thus the feedback controller based on the H-LIP approximately controls the robot to behave like the H-LIP, the differences between which stay in an error invariant set. Model Predictive Control (MPC) is applied to the H-LIP for global position control in 3D. The H-LIP stepping then generates desired step sizes for the robot to track. Moreover, turning behavior is integrated with the step planning. The proposed framework is verified on the 3D underactuated bipedal robot Cassie in simulation together with a proof-of-concept experiment.
| Item Type: | Book Section | |||||||||
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| Additional Information: | © 2021 IEEE. This work was supported by NSF 1924526 and 1923239. | |||||||||
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| DOI: | 10.1109/icra48506.2021.9561961 | |||||||||
| Record Number: | CaltechAUTHORS:20211217-96491000 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20211217-96491000 | |||||||||
| Official Citation: | X. Xiong, J. Reher and A. D. Ames, "Global Position Control on Underactuated Bipedal Robots: Step-to-step Dynamics Approximation for Step Planning," 2021 IEEE International Conference on Robotics and Automation (ICRA), 2021, pp. 2825-2831, doi: 10.1109/ICRA48506.2021.9561961 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 112508 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 17 Dec 2021 21:34 | |||||||||
| Last Modified: | 17 Dec 2021 21:34 |
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