The sun sensor used in the 3-axis control of a spacecraft is modeled, and its effects on sun acquisition performance are demonstrated. The sensor is made up of the combined outputs of four discrete solar cells electrically connected in a manner to achieve the control error signals. To protect these cells from interfering reflections from the spacecraft body, a shade surrounding each cell is added. The shades produce significant variations in sensor outputs from the unshaded outputs. Acquisition control stability is influenced by the introduction of the shade. A set theoretic approach is used to obtain a model of the shaded sensor output. This model is incorporated in a rigid body spacecraft simulation, and sun acquisition performance is presented.


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    Title :

    Shaded Sun Sensor Modeling for Spacecraft Acquisition Performance Analysis


    Contributors:
    K. K. Wong (author) / G. M. Manke (author) / R. T. Uyeminami (author)

    Publication date :

    1974


    Size :

    25 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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