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• W4210546460 abstract "Translating the center of mass (CoM) while fixing the orientation of a rigid body supported by relatively massless, actuated limbs is a common problem setting in legged robotics. This paper proposes a hierarchical approach to such maneuvers that decouples CoM task planning from body orientation control in sagittal-plane models, thereby exposing a well-studied and computationally effective low dimensional dynamical system that can be used for CoM task planning. The resulting algorithms directly address the control authority (degree of underactuation) available at a given contact mode, enabling a-priori plans with these intuitive, robust pendular dynamics to be formally embedded at the (virtual) CoM of planar floating-torso models, while focusing high gain posture stabilizing feedback upon the body orientation. A series of numerical and empirical examples address single- and multi-legged leaping — transitional maneuvers where only a single brief stance mode is available to load energy into the CoM and guide its direction. We compare our hierarchical method to a model-based model-predictive controller in one of the tasks, demonstrating similar performance with a significantly smaller computational footprint." @default.
• W4210546460 created "2022-02-08" @default.
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• W4210546460 date "2022-01-01" @default.
• W4210546460 modified "2023-10-14" @default.
• W4210546460 title "Mode-Reactive Template-Based Control in Planar Legged Robots" @default.
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• W4210546460 doi "https://doi.org/10.1109/access.2022.3148921" @default.
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