Embedded joint torque sensor with reduced torque ripple of harmonic drive

In Moon Kim, Hwi Su Kim, Jae Bok Song

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

    15 Citations (Scopus)

    Abstract

    Joint torque sensors are widely used in service robots for force control and collision detection. However, since torque sensors are often directly connected to a harmonic drive, it must be insensitive to torque ripple, the noise from the harmonic drive due to its unique structure. The magnitude of torque ripple is several times higher than electrical noise, and it significantly decreases robot's force control and collision detection performances. In this study, we propose the torque ripple reduction method through the change of the installation position of Wheatstone bridges, and the structure design of torque sensor for service robot arms through FEM analysis. The performance of the proposed reduction method was verified through experiments.

    Original languageEnglish
    Title of host publicationIntelligent Autonomous Systems 12 - Proceedings of the 12th International Conference, IAS 2012
    PublisherSpringer Verlag
    Pages633-640
    Number of pages8
    EditionVOL. 2
    ISBN (Print)9783642339318
    DOIs
    Publication statusPublished - 2013
    Event12th International Conference on Intelligent Autonomous Systems, IAS 2012 - Jeju Island, Korea, Republic of
    Duration: 2012 Jun 262012 Jun 29

    Publication series

    NameAdvances in Intelligent Systems and Computing
    NumberVOL. 2
    Volume194 AISC
    ISSN (Print)2194-5357

    Other

    Other12th International Conference on Intelligent Autonomous Systems, IAS 2012
    Country/TerritoryKorea, Republic of
    CityJeju Island
    Period12/6/2612/6/29

    Keywords

    • harmonic drive
    • joint torque sensor
    • service robot arm
    • torque ripple

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • General Computer Science

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