Contact force observer for space robots

In this paper, the problem of estimating a contact wrench at the end-effector for a space robot is addressed. To this aim, a generalized force observer based on a base-joints dynamics is first reviewed. Then, a different formulation is proposed, which is based on a centroidal-joints dynamics. The pr...

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Bibliographic Details
Main Authors: Cavenago, Francesco, Giordano, Alessandro M., Massari, Mauro
Format: Conference Proceeding
Language:English
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Summary:In this paper, the problem of estimating a contact wrench at the end-effector for a space robot is addressed. To this aim, a generalized force observer based on a base-joints dynamics is first reviewed. Then, a different formulation is proposed, which is based on a centroidal-joints dynamics. The proposed observer features interesting decoupling properties from the base linear velocity that lead to a more practical and better-performing estimation when limitations in real space scenarios are considered. The two observers are compared and the advantage of the proposed one is shown through a simulation example featuring a free-floating robot composed of a 7 degrees-of-freedom (DOF) arm mounted on a 6DOF moving base.
ISSN:2576-2370
DOI:10.1109/CDC40024.2019.9029285