Residual-based contacts estimation for humanoid robots. Flacco, F., Paolillo, A., & Kheddar, A. In 2016 IEEE-RAS 16th International Conference on Humanoid Robots (Humanoids), pages 409–415, November, 2016.
doi  abstract   bibtex   
The residual method for detecting contacts is a promising approach to allow physical interaction tasks with humanoid robots. Nevertheless, the classical formulation, as developed for fixed-base robots, cannot be directly applied to floating-base systems. This paper presents a novel formulation of the residual based on the floating-base dynamics modeling of humanoids. This leads to the definition of the internal and external residual. The first estimates the joints effort due to the external perturbation acting on the robot. The latter is an estimation of the external forces acting on the floating-base of the robot. The potential of the method is shown proposing a simple internal residual-based reaction strategy, and a procedure for estimating the contact point that combines both the internal and external residuals.
@inproceedings{flacco_residual-based_2016,
	title = {Residual-based contacts estimation for humanoid robots},
	doi = {10.1109/HUMANOIDS.2016.7803308},
	abstract = {The residual method for detecting contacts is a promising approach to allow physical interaction tasks with humanoid robots. Nevertheless, the classical formulation, as developed for fixed-base robots, cannot be directly applied to floating-base systems. This paper presents a novel formulation of the residual based on the floating-base dynamics modeling of humanoids. This leads to the definition of the internal and external residual. The first estimates the joints effort due to the external perturbation acting on the robot. The latter is an estimation of the external forces acting on the floating-base of the robot. The potential of the method is shown proposing a simple internal residual-based reaction strategy, and a procedure for estimating the contact point that combines both the internal and external residuals.},
	booktitle = {2016 {IEEE}-{RAS} 16th {International} {Conference} on {Humanoid} {Robots} ({Humanoids})},
	author = {Flacco, F. and Paolillo, A. and Kheddar, A.},
	month = nov,
	year = {2016},
	keywords = {Dynamics, Force, Humanoid robots, Robot kinematics, Robot sensing systems, estimation theory, external force estimation, external perturbation, fixed-base robots, floating-base systems, human-robot interaction, humanoid robot floating-base dynamics modeling, humanoid robots, internal residual-based reaction strategy, perturbation techniques, physical interaction tasks, residual-based contact estimation, robot dynamics},
	pages = {409--415}
}

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