In-flight estimation of large structure model errors may have to be carried out in order to detect inevitable deficiencies in large structure controller/estimator models. A least-squares formulation, where a quadratic functional of the model errors is minimized, is used as a basis to develop concepts for state and model error estimation. An integral operator approach for estimation leads to a geometrical interpretation of the model error estimates. One of the insights gained by this interpretation is that arbitrary but unknown model errors can be decomposed as the sum of two components that are orthogonal in some sense. The basic ideas in the least-squares formulation are first set forth with a two-dimensional analogy that has most of the essential features of the general estimation problem. The generalized formulation is then presented. Current efforts are directed toward application of the foregoing results to a reference large structure model. (DePo)


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    Title :

    Optimal estimation of large structure model errors


    Additional title:

    Optimale Ueberpruefung eventueller Fehler in der Konstruktion bei Modellen von Raumfaehren


    Contributors:

    Published in:

    Publication date :

    1979


    Size :

    8 Seiten, 2 Bilder, 3 Tabellen, 7 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English