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A correct formulation for the Orientation Dynamic Movement Primitives for robot control in the Cartesian space

Authors: Koutras, Leonidas; Doulgeri, Zoe;

A correct formulation for the Orientation Dynamic Movement Primitives for robot control in the Cartesian space

Abstract

Dynamic movement primitives (DMP) are an efficient way for learning and reproducing complex robot behaviors. A singularity free DMP formulation for orientation in the Cartesian space is proposed by Ude et al. in 2014 and has been largely adopted by the research community. In this work, we demonstrate the undesired oscillatory behavior that may arise when controlling the robot’s orien- tation with this formulation, producing a motion pattern highly deviant from the desired and highlight its source. A correct formulation is then proposed that alle- viates such problems while guaranteeing generation of orientation parameters that lie in SO(3). We further show that all aspects and advantages of DMP including ease of learning, temporal and spatial scaling and the ability to include coupling terms are maintained in the proposed formulation. Simulations and experiments with robot control in SO(3) are performed to demonstrate the performance of the proposed formulation and compare it with the previously adopted one.

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Keywords

Control in Orientation Trajectories, Dynamic Movement Primitives

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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