The STRAP IV attitude control system was designed, tested, and successfully launched to provide stable high accuracy pointing at nontrackable X-ray sources. On its initial flight (May 19, 1972), the STRAP IV control system updated its high accuracy, rate integrating gyros on two successive stellar targets and then maneuvered the rocket body to point the experimental payload at two separate X-ray sources and an X-ray-free background location. The third axis, which remained under the control of a coarse free gyro, was updated by a technique of successive star-target coordinate transformation to ensure the correct fine-axis azimuth alignment for the high accuracy inertial maneuvers. Pointing accuracies of 4 arc min with limit cycle stability of less than 20 arc sec peak to peak were obtained on all targets.


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    Title :

    STRAP IV - High accuracy, low drift attitude control system.


    Contributors:

    Conference:

    Sounding Rocket Technology Conference ; 1973 ; Albuquerque, NM


    Publication date :

    1973-03-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :


    STRAP IV - High accuracy, low drift attitude control system

    SHREWSBERRY, D. / BUDNEY, T. / RILEY, D. et al. | AIAA | 1973


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    BUDNEY, T. / COLLINSON, T. / STONE, R. | AIAA | 1982


    STRAP V - Higher accuracy, lower drift attitude control system

    Budney, T. J. / Collinson, T. W. / Stone, R. W. | NTRS | 1982


    Stellar Tracking Rocket Attitude Positioning /STRAP/ System

    Greeb, M. E. / Shrewsberry, D. J. | NTRS | 1970


    Stellar Tracking Rocket Attitude Positioning (STRAP) System

    GREEB, M. / SHREWSBERRY, D. | AIAA | 1970