Elastic and elasto-dynamic models of robot manipulators
TypeRapport de recherche
The report presents an advanced stiffness modeling technique for parallel manipulators composed of perfect and non-perfect serial chains. The developed technique contributes both to the stiffness modeling of serial and parallel manipulators under internal and external loadings. Particular attention has been done to enhancement of VJM-based stiffness modeling technique for the case of auxiliary loading (applied to the intermediate points). The obtained results allows us to take into account gravity forces induced by the link weights which are assumed to be applied in the intermediate points. In contrast to other works, the developed technique is able to take into account deviation of the end-platform location because of inaccuracy in the geometry of serial chains, which does not allow to assemble manipulator without internal stresses. The developed aggregation procedure combines the chain stiffness models and produces the relevant force-deflection relation, the aggregated Cartesian stiffness matrix and the reference point displacements caused by inaccuracy in kinematic chains. The developed technique can be applied to both over-constrained and under-constrained manipulators, and is suitable for the cases of both small and large deflections.
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KLIMCHIK, Alexandr; PASHKEVICH, Anatol (ABBA Gabriel, 2012)This report proposes a CAD-based approach for identification of the elasto-static parameters of the robotic manipulators. The main contributions are in the areas of virtual experiment planning and algorithmic data processing, ...
KLIMCHIK, Alexandr; PASHKEVICH, Anatol; GARNIER, Sébastien; CARO, Stéphane; LEONARD, François; ABBA, Gabriel; QIN, Jinna (ABBA Gabriel, 2014)The objective of this report is to detail the models used in simulation and the results obtained in simulation for both machining and FSW process. This report contains in a first part the details of modeling flexibilities ...
KLIMCHIK, Alexandr; PASHKEVICH, Anatol; CARO, Stéphane (ABBA Gabriel, 2013)In robotic-based machining, an interaction between the workpiece and technological tool causes essential deflections that significantly decrease the manufacturing accuracy. Relevant compliance errors highly depend on the ...
KLIMCHIK, Alexandr; WU, Yier; ABBA, Gabriel; GARNIER, Sébastien; FURET, Benoit; PASHKEVICH, Anatol (IFAC, 2013)The paper focuses on the robust identification of geometrical and elastostatic parameters of robotic manipulator. The main attention is paid to the efficiency improvement of the identification algorithm. To increase the ...
Robot comparison based on local and global indices proposed and related to FSW welding and machining CARO, Stéphane; PASHKEVICH, Anatol; ABBA, Gabriel (2014)This deliverable deals with the comparison of robots as a function of local and global indices related to machining operations of metallic and composite parts and friction stir welding. Some typical industrial operations ...