The report considers the capability of three autopilots, with varying dependency or inertial navigation inputs, to perform the automatic landing task in the presence of ILS beam anomalies. Three sets of pitch and roll axis control laws for a commercial jet transport were analyzed and flight tested to determine their comparative advantages and limitations. Conventional autopilots with only minor or no reliance on inertial inputs are sensitive to ILS beam imperfections. It is shown that complementary filtering of ILS position information with INS-derived acceleration and velocity results in a very marked attenuation of airplane response to beam bends, noise, and overflight interference. A set of equations is derived by which the acceptability of system performance during an automatic approach can be assessed. The capability of the three autopilots to provide acceptance on Category 1 and 2 ILS beams is investigated. (Author)


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    Title :

    Inertially Augmented Automatic Landing System: Autopilot Performance with Imperfect ILS Beams


    Contributors:
    R. J. Bleeg (author) / H. F. Tisdale (author) / R. M. Vircks (author)

    Publication date :

    1972


    Size :

    242 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Inertially Augmented Approach Couplers

    D. A. Tiedeman / F. B. Benson / L. V. Miller et al. | NTIS | 1979


    Inertially augmented approach couplers

    Tiedeman, D.A. / Benson, F.B. / Miller, L.V. et al. | Tema Archive | 1979