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Toward on-line robot vibratory modes estimation

Communication avec acte
Author
DELPOUX, Romain
ccOLABI, Adel
178374 Laboratoire des Sciences de l'Information et des Systèmes : Ingénierie Numérique des Systèmes Mécaniques [LSIS- INSM]
ccBEAREE, Richard
ccGIBARU, Olivier

URI
http://hdl.handle.net/10985/11406
Date
2014

Abstract

This paper is concerned with preliminaries results on robot vibratory modes on-line estimation. The dominating oscillatory mode of the robot arm is isolated by comparing the robot position given by the motors encoders and an external measure at the tool-tip of the robot arm. In this article the external measurement is provided by a laser tracker. The isolation of the oscillation permits to identify the vibratory mode, i.e. the natural frequency and the damping ratio of the undesired phenomena. Here we propose a comparison between the algebraic method and the sliding modes for the parameter identification. This comparison is motivated by the fact that both methods provide finite time convergence. Experimental identifications are proposed on a 6 degrees of freedom (DOF) manipulator robot, St¨aubli RX-170B.

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