Terrain-Aware Foot Placement for Bipedal Locomotion Combining Model Predictive Control, Virtual Constraints, and the ALIP
Terrain-Aware Foot Placement for Bipedal Locomotion Combining Model Predictive Control, Virtual Constraints, and the ALIP
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结合模型预测控制、虚拟约束和 ALIP 的双足运动的地形感知足部放置
DOI:
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
J. Grizzle
中科院分区:
文献类型:
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作者:
G. Gibson;Oluwami Dosunmu;Yukai Gong;J. Grizzle
—This paper draws upon three themes in the bipedal control literature to achieve highly agile, terrain-aware locomotion. By terrain aware, we mean the robot can use information on terrain slope and friction cone as supplied by state-of-the-art mapping and trajectory planning algorithms. The process starts with abstracting from the full dynamics of a Cassie 3D bipedal robot, an exact low-dimensional representation of its centroidal dynamics, parameterized by angular momentum. Under a piecewise planar terrain assumption, and the elimination of terms for the angular momentum about the robot’s center of mass, the centroidal dynamics become linear and has dimension four. Four-step-horizon model predictive control (MPC) of the centroidal dynamics provides step-to-step foot placement commands. Importantly, we also include the intra-step dynamics at 10 ms intervals so that realistic terrain-aware constraints on robot’s evolution can be imposed in the MPC formulation. The output of the MPC is directly implemented on Cassie through the method of virtual constraints. In experiments, we validate the performance of our control strategy for the robot on inclined and stationary terrain, both indoors on a treadmill and outdoors on a hill.
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影响因子:
9.2
作者:
Da, Xingye;Grizzle, Jessy
通讯作者:
Grizzle, Jessy
DOI:
10.1109/icra48506.2021.9561961
发表时间:
2021
期刊:
IEEE International Conference on Robotics and Automation (ICRA 2021
影响因子:
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作者:
Xiong, Xiaobin;Reher, Jenna;Ames, Aaron D.
通讯作者:
Ames, Aaron D.
影响因子:
7.8
作者:
Huang, Jiunn-Kai;Grizzle, Jessy W.
通讯作者:
Grizzle, Jessy W.
DOI:
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发表时间:
2020
期刊:
IEEE robotics automation letters
影响因子:
--
作者:
Akbari Hamed, Kaveh;Kim, Jeeseop;Pandala, Abhishek
通讯作者:
Pandala, Abhishek