High-bandwidth force and impedance control for industrial robots

  • Authors:
  • Eckhard Freund;Jürgen Pesara

  • Affiliations:
  • Institute of Robotics Research, University of Dortmund, D-44227 Dortmund, Germany. E-mail freund@damon.irf.uni-dortmund.de or pesara@damon.irf.uni-dortmund.de;Institute of Robotics Research, University of Dortmund, D-44227 Dortmund, Germany. E-mail freund@damon.irf.uni-dortmund.de or pesara@damon.irf.uni-dortmund.de

  • Venue:
  • Robotica
  • Year:
  • 1998

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Abstract

Common geared industrial robots call for force control methods with special properties such as good rejection of frictional disturbances, smoothness of corrective motions, and more. A new method is presented which meets these requirements and provides a high control bandwidth. In the manner of hybrid control, directions of a task frame can be selected to be force, impedance or position controlled. A joint-based inner position loop and a superimposed predictive force controller are used. Practical results include data from a robotic grinding facility. Here, the controller proved robustness and good performance under rough conditions.