Improving the dynamic accuracy of elastic industrial robot joint by algebraic identification approach

In this paper, an improvement of the dynamic accuracy of a flexible robot joint is addressed. Based on the observation of the measured axis deformation, a simplified elastic joint model is deduced. In the first step, the non-linear model component's is analyzed and identified in the cases of th...

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Main Authors: Oueslati, M., Bearee, R., Gibaru, O., Moraru, G.
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Bearee, R.
Gibaru, O.
Moraru, G.
description In this paper, an improvement of the dynamic accuracy of a flexible robot joint is addressed. Based on the observation of the measured axis deformation, a simplified elastic joint model is deduced. In the first step, the non-linear model component's is analyzed and identified in the cases of the gravity bias and the friction term. In the second step, a non-asymptotically algebraic fast identification of the oscillatory behavior of the robot axis is introduced. Finally, the performances of the identification approach are exploited in order to improve the dynamic accuracy of a flexible robot axis. This is done experimentally by the combination of the adaptation of the jerk time profile to reduce the end-point vibration and the model-based pre-compensation of the end-point tracking error.
doi_str_mv 10.1109/IConSCS.2012.6502456
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title Improving the dynamic accuracy of elastic industrial robot joint by algebraic identification approach
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