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Human-like trajectory generation and footstep planning has been a longstanding open problem in humanoid robotics. Meanwhile, research in computer graphics kept developing machine-learning methods for character animation based on training human-like models directly on motion capture data. Such methods proved effective in virtual environments, mainly focusing on trajectory visualization. This paper presents ADHERENT, a system architecture integrating machine-learning methods used in computer graphics with whole-body control methods employed in robotics to generate and stabilize human-like trajectories for humanoid robots. Leveraging human motion capture locomotion data, ADHERENT yields a general footstep planner, including forward, sideways, and backward walking trajectories that blend smoothly from one to another. At the joint configuration level, ADHERENT computes data-driven whole-body postural references coherent with the generated footsteps, thus increasing the human likeness of the resulting robot motion. Extensive validations of the proposed architecture are presented with both simulations and real experiments on the iCub humanoid robot. Supplementary video: https://sites.google.com/view/adherent-trajectory-learning.
Author Information
Paolo Maria Viceconte (Sapienza University of Rome & Istituto Italiano di Tecnologia)
Raffaello Camoriano (Istituto Italiano di Tecnologia)
Machine Learning and Robotics Postdoctoral Researcher with a strong Computer Science and Engineering background, focusing on scalable algorithms for predictive modeling, incremental lifelong learning and applications in robotics, visual recognition and dynamics learning.
Giulio Romualdi (Fondazione Istituto Italiano di Tecnologia, Università degli studi di Genova)
Diego Ferigo (Italian Institute of Technology)
Stefano Dafarra (Fondazione Istituto Italiano di Tecnologia)
Silvio Traversaro (Italian Institute of Technology)
Giuseppe Oriolo (La Sapienza)
Lorenzo Rosasco (IIT)
Daniele Pucci (Italian Institute of Technology)
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