Design of optimized soft soles for humanoid robotsReport as inadecuate

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1 LIRMM - Laboratoire d-Informatique de Robotique et de Microélectronique de Montpellier 2 CNRS-AIST JRL - Joint Robotics Laboratory Japan 3 PRISME - Laboratoire Pluridisciplinaire de Recherche en Ingénierie des Systèmes, Mécanique et Energétique

Abstract : We describe a methodology to design foot soles for a humanoid robot given walking gait parameters i.e. given center-of-mass and zero-moment-point trajectories. In order to obtain an optimized compliant sole, we devised a shape optimization framework which takes –among other inputs, an initial rough simplified shape of the sole and refines it through successive optimization steps under additional constraints and a cost function. The shape is optimized based on the simulation of the sole deformation during an entire walking step, taking time dependent input of the walking pattern generator into account. Our shape optimization framework is able to minimize the impact of the foot with the ground during the heel-strike phase and to limit foot rotation in case of perturbations. Indeed, low foot rotation enforces a vertical posture and secures the balance of the humanoid robot. Moreover, weight restriction formulated as a constraint on the sole volume is added to our optimization problem.

Keywords : Shape Optimizations Compliant soles Humanoid robots Walking

Author: Giovanni De Magistris - Sylvain Miossec - Adrien Escande - Abderrahmane Kheddar -



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