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Excitation and Stabilization of Passive Dynamics in Locomotion using Hierarchical Operational Space Control

Publication date:

Authors:

  • Presented at: 2014 IEEE International Conference on Robotics and Automation (ICRA 2014), Hong Kong, China, May 31 – June 7, 2014
  • Publication date: 2014

This paper describes a hierarchical operational space control (OSC) method based on least square optimization and outlines different ways to reduce the dimensionality of the optimization vector. The framework allows to emulate various behaviors by prioritized task-space motion, joint torque, and contact force optimization. Moreover, a methodology is introduced to partially excite the natural dynamics of the robot by open-loop motor regulation while the entire behavior is stabilized by hierarchical OSC. As a major contribution, the presented control strategies are tested and validated in real hardware walking, trotting, and pronking experiments using a fully torque controllable quadrupedal robot.

    Reference

    • Detailed record: https://infoscience.epfl.ch/record/200254?ln=en
    • EPFL-CONF-200254
    Reference
    Read the paper
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