This paper describes the development of a high resolution, six-degree of freedom positioning mechanism. This mechanism, based on the Stewart platform concept, was designed for use with the Developmental Comparative Active Optics Telescope Testbed (DCATT), a ground-based technology testbed for the Next Generation Space Telescope (NGST). The mechanism provides active control to the DCATT telescope's segmented primary mirror. Emphasis is on design decisions and technical challenges. Significant issues include undesirable motion properties of PZT-inchworm actuators, testing difficulties, dimensional stability and use of advanced composite materials. Supporting test data from prototype mechanisms is presented.


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    Title :

    Design of a High Resolution Hexapod Positioning Mechanism


    Contributors:
    J. Britt (author)

    Publication date :

    2001


    Size :

    16 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Design of a High Resolution Hexapod Positioning Mechanism

    Britt, Jamie / Brodeur, Stephen J. | NTRS | 2001



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