Optimal control techniques are used to drive the numerical error (truncation, roundoff, commutation) in computing the quaternion vector to zero. The normalization of the quaternion is carried out by appropriate choice of a performance index, which can be optimized. The error equations are derived from Friedland's (1978) theoretical development, and a matrix Riccati equation results for the computation of the gain matrix. Simulation results show that a high precision of the order of 10 to the -12th can be obtained using this technique in meeting the q(T)q=1 constraint. The performance of the estimator in the presence of the feedback control that maintains the normalization, is studied.


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    Title :

    Optimal control of quaternion propagation errors in spacecraft navigation


    Contributors:
    Vathsal, S. (author)


    Publication date :

    1986-06-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English





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