Title
Walking on non-planar surfaces using an inverse dynamic stack of tasks.
Abstract
This paper presents a method to handle walking on non-planar surfaces. The trajectories of the center of mass and the next position of the foot are given by a pattern generator. Then, an inverse dynamics control scheme with a quadratic programming optimization solver is used to let the foot go from its initial to its final position, controlling also the center of mass and the waist. The solver can handle an arbitrary number of contact points. When the swinging foot is going down, collision points are detected and they are added as contact points to the model as soon as they appear. If there are three or more contact points, the foot can safely step, but if there are one or two contact points, the foot rotates properly to generate the largest support polygon. Using this heuristic, the foot can stand on non-planar surfaces. Simulation results of the HRP-2 robot walking on a surface with obstacles are presented.
Year
DOI
Venue
2012
10.1109/HUMANOIDS.2012.6651616
Humanoids
Keywords
Field
DocType
collision avoidance,inverse problems,legged locomotion,motion control,quadratic programming,robot dynamics,trajectory control,HRP-2 robot walking,center of mass trajectory,collision points detection,contact points,foot final position,foot initial position,foot position,inverse dynamics control scheme,largest support polygon,nonplanar surface walking,obstacles,pattern generator,quadratic programming optimization solver,swinging foot control,waist
Polygon,Motion control,Control theory,Simulation,Digital pattern generator,Computer science,Inverse problem,Solver,Quadratic programming,Inverse dynamics,Center of mass
Conference
ISSN
Citations 
PageRank 
2164-0572
1
0.37
References 
Authors
0
4
Name
Order
Citations
PageRank
Oscar E. Ramos1323.64
Nicolas Mansard249039.67
Olivier Stasse3143885.86
Philippe Souères432343.63