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A model independent observer based output feedback tracking controller for robotic manipulators with dynamical uncertainties

Published online by Cambridge University Press:  05 October 2015

Erkan Zergeroglu*
Affiliation:
Department of Computer Engineering, Gebze Institute of Technology, 41400, Gebze, Kocaeli, Turkey. E-mail: ekaleli@bilmuh.gyte.edu.tr
Enver Tatlicioglu
Affiliation:
Department of Electrical & Electronics Engineering, Izmir Institute of Technology, Gulbahce Koyu, Urla, Izmir, 35430 Turkey. E-mail: envertatlicioglu@iyte.edu.tr
Egemen Kaleli
Affiliation:
Department of Computer Engineering, Gebze Institute of Technology, 41400, Gebze, Kocaeli, Turkey. E-mail: ekaleli@bilmuh.gyte.edu.tr
*
*Corresponding author. E-mail: ezerger@bilmuh.gyte.edu.tr
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In this work, we propose the development and the corresponding stability analysis of a novel, observer-based output feedback (OFB), tracking controller for rigid-link robot manipulators. Specifically, a model-independent variable-structure-like observer in conjunction with a desired dynamic compensation technique have been utilized to remove the link velocity dependency of the controller formulation. Asymptotic stability of the observer--controller couple is then guaranteed via Lyapunov-based arguments. An adaptive controller extension is also presented to illustrate the expansiveness of the proposed scheme. Experimental studies performed on a two-link planar robot with dynamical uncertainties are included in order to demonstrate the performance and feasibility of the proposed method.

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Type
Articles
Copyright
Copyright © Cambridge University Press 2015