An algorithm is presented that incorporates real time data from two infrared cameras and computes the attitude parameters of the Spacecraft COntrol Lab Experiment (SCOLE), a lab apparatus representing an offset feed antenna attached to the Space Shuttle by a flexible mast. The algorithm uses camera position data of three miniature light emitting diodes (LEDs), mounted on the SCOLE platform, permitting arbitrary camera placement and an on-line attitude extraction. The continuous nature of the algorithm allows identification of the placement of the two cameras with respect to some initial position of the three reference LEDs, followed by on-line six degrees of freedom attitude tracking, regardless of the attitude time history. A description is provided of the algorithm in the camera identification mode as well as the mode of target tracking. Experimental data from a reduced size SCOLE-like lab model, reflecting the performance of the camera identification and the tracking processes, are presented. Computer code for camera placement identification and SCOLE attitude tracking is listed.


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    Title :

    Attitude Identification for SCOLE Using Two Infrared Cameras


    Contributors:
    J. Shenhar (author)

    Publication date :

    1991


    Size :

    64 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    On-line identification and attitude control for SCOLE

    MONTGOMERY, R. / SHENHAR, J. / WILLIAMS, J. | AIAA | 1987


    Modeling and identification of SCOLE

    Meirovitch, L. / Norris, M. A. | NTRS | 1987


    The SCOLE design challenge

    Taylor, Larry / Balakrishnan, A. V. | NTRS | 1987


    Control of SCOLE

    Meirovitch, L. / Norris, M. A. | NTRS | 1987