Influence of frictions on gait optimization of a biped robot with an anthropomorphic knee
TypeCommunications avec actes
This paper presents the energy consumption of a biped robot with a new modelled structure of knees which is called rolling knee (RK). The dynamic model, the actuators and the friction coefficients of the gear box are known. The optimal energy consumption can also be calculated. The first part of the paper is to validate the new kinematic knee on a biped robot by comparing the energy consumption during a walking step of the identical biped but with revolute joint knees. The cyclic gait is given by a succession of Single Support Phase (SSP) followed by an impact. The gait trajectories are parameterized by cubic spline functions. The energetic criterion is minimized through optimization while using the simplex algorithm and Lagrange penalty functions to meet the constraints of stability and deflection of the mobile foot. An analysis of the friction coefficients is done by simulation to compare the human characteristics to the robot with RK. The simulation results show an energy consumption reduction through the biped with rolling knee configuration. The influence of friction coefficients shows the energy consumption of biped robot is close to that of the human.
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HOBON, Mathieu; LAKBAKBI EL YAAQOUBI, Nafissa; ABBA, Gabriel (2013)The knee of biped robots has usually one degree of freedom which one is a revolute joint. This work focuses on the study of rolling contact knee. The knee is composed of a cylinder in the extremity of the femur, rolling ...
HOBON, Mathieu; LAKBAKBI EL YAAQOUBI, Nafissa; ABBA, Gabriel (Laboratoire de Conception Fabrication Commande (LCFC), 2013)This report presents the dynamic modeling of a planar biped robot. The robot has seven bodies and 9 DOF. Two kinematic configurations are investigated. The first has only revolute joints on all articulation. The second ...
HOBON, Mathieu; LAKBAKBI EL YAAQOUBI, Nafissa; ABBA, Gabriel (AFM, 2011)L’article présente la méthodologie d’obtention de trajectoires optimales de marche pour une nouvelle classe de robot bipède. Le robot bipède est constitué de sept corps et possède des genoux anthropomorphes avec un contact ...
HOBON, Mathieu; LAKBAKBI EL YAAQOUBI, Nafissa; ABBA, Gabriel (Elsevier, 2013)The design of humanoid robots has been a tricky challenge for several years. Due to the kinematic complexity of human joints, their movements are notoriously difficult to be reproduced by a mechanism. The human knees allow ...
HOBON, Mathieu; LAKBAKBI EL YAAQOUBI, Nafissa; ABBA, Gabriel (Elsevier, 2011)In this paper, we address the problem of optimization of trajectories for a new class of biped robot. The knees of this biped are similar as the anthropomorphic one and have a rolling contact between the femur and the ...