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Two-arm trajectory planning in a manipulation task

G J Garvin1, M Zefran, E A Henis

  • 1GRASP Laboratory, University of Pennsylvania,Philadelphia 19104-6228, USA.

Biological Cybernetics
|January 1, 1997
PubMed
Summary
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This study explored how two arms coordinate movements to position and orient an object. Findings suggest rotational and translational motions are planned separately and then combined hierarchically.

Area of Science:

  • Robotics
  • Human Motor Control
  • Biomechanics

Background:

  • Coordinated movements of multiple limbs are crucial for complex tasks.
  • Understanding trajectory planning in dual-arm manipulation is essential for robotics and neuroscience.

Purpose of the Study:

  • To investigate the trajectory planning for a two-arm task involving object positioning and orientation.
  • To test the hypothesis of decoupled planning for rotational and translational motion components.

Main Methods:

  • Experimental measurement of two-arm trajectories during a coordinated positioning/orienting task.
  • Formulation of two mathematical models extending the minimum-jerk model for dual-arm coordination.
  • Comparison of model predictions with experimental data.

Related Experiment Videos

Main Results:

  • Model predictions showed qualitative agreement with experimental data for two-arm motions.
  • Neither model fully explained the observed configuration dependence or velocity characteristics.
  • Experimental data supports independent planning of rotational and translational components.

Conclusions:

  • Two-arm motions in positioning/orienting tasks appear to involve independently planned rotational and translational components.
  • These components are likely combined hierarchically to generate the final motion.
  • The developed models provide a foundation for future research in dual-arm trajectory generation.