Physical control of the rotation center of an unsupported object - Rope turning by a humanoid robot

Chyon Hae Kim, Kenta Yonekura, Hiroshi Tsujino, Shigeki Sugano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Citations (Scopus)

Abstract

The paper describes a physical control method for rotating an object that has no support from below. Conventionally, physical correction of the rotational center of an unsupported object while maintaining rotation around an axis that is located outside the object is difficult. In particular, for the case in which the object is soft and pliable, control is more difficult because gravity can easily affect the shape of the object. As an example, we selected a task in which a robot turns a rope using an end effector. In order to accomplish this task, we propose a novel control method. To control the rotational center to a target position while fixing the shape by centrifugal force, we formulated a method whereby a compensator is added to a control rule that enables the trajectory of the end effector to converge to a limit-cycle within a fixed radius. We applied the proposed control method to a simplified rope simulator. The results of the simulation revealed that the end effector of the robot and the center of mass of the simplified rope converge to a limit-cycle attractor. This result indicates that the system applies the forces that stabilize the shape of the rope and the location of the rotational center. In addition, we applied the proposed method to a rope turning task performed by a humanoid robot. The robot was able to turn a rope with one fixed end and could collaborate with a human. Both tasks could be realized by the same control method.

Original languageEnglish
Title of host publication9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09
Pages148-153
Number of pages6
DOIs
Publication statusPublished - 2009 Dec 1
Event9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09 - Paris, France
Duration: 2009 Dec 72009 Dec 10

Publication series

Name9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09

Conference

Conference9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09
CountryFrance
CityParis
Period09/12/709/12/10

ASJC Scopus subject areas

  • Computer Science(all)

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    Kim, C. H., Yonekura, K., Tsujino, H., & Sugano, S. (2009). Physical control of the rotation center of an unsupported object - Rope turning by a humanoid robot. In 9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09 (pp. 148-153). [5379585] (9th IEEE-RAS International Conference on Humanoid Robots, HUMANOIDS09). https://doi.org/10.1109/ICHR.2009.5379585