Compliant Task-Space Control with Back-Drivable Servo Actuators

  • Jörg Stückler
  • Sven Behnke
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7416)

Abstract

In this paper, we propose a new approach to compliant task-space control for high degree-of-freedom manipulators driven by position-controlled actuators. The actuators in our approach are back-drivable and allow to limit the torque used for position control. Traditional approaches frequently achieve compliance through redundancy resolution. Our approach not only allows to adjust compliance in the null-space of the motion but also in the individual dimensions in task-space. From differential inverse kinematics we derive torque limits for each joint by examining the contribution of the joints to the task-space motion. We evaluate our approach in experiments with specific motions. We also report on the application of our approach at RoboCup 2010, where we successfully opened and closed the fridge in the RoboCup@Home finals.

Keywords

compliance control task-space control domestic service robots servo actuators 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jörg Stückler
    • 1
  • Sven Behnke
    • 1
  1. 1.Computer Science Institute VI, Autonomous Intelligent SystemsUniversity of BonnBonnGermany

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