A 4D area navigation system was designed to guide aircraft along a prespecified flight path (reference path) such that the aircraft would arrive at the approach gate at a time specified by the ATC controller. Key components to achieve this requirement were: (1) stored reference trajectories; (2) a continuously recomputed capture trajectory to a selected waypoint on the reference trajectory so as to achieve the desired time of arrival; (3) electronic situation displays; and (4) a control system to follow the overall trajectory in space and time. The system was implemented in a digital integrated avionics system (STOLAND) installed on a CV-340 airplane. Although the 4D system was designed primarily for automatic operation, it was flight tested in a flight director mode (the pilot follows the flight director commands), because the CV-340 autopilot servos were not tied to the avionics system. The flight test showed that, even in the flight director mode, the pilot did achieve the objectives of path tracking and time of arrival control with only moderate workload. The system also permitted controlled delay of the time of arrival by path stretching, which takes advantage of the continuously changing capture trajectory to predict the time of arrival. Simulations in the automatic and manual modes were used to complement the flight data.


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    Title :

    The 4D area navigation system description and flight test results


    Contributors:
    Lee, H. Q. (author) / Neuman, F. (author) / Hardy, G. H. (author)

    Publication date :

    1975-08-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    4D area navigation system description and flight test results

    Lee, Homer Q. / Neumann, Frank / Hardy, Gordon H. | TIBKAT | 1975


    The 4D Area Navigation System Description and Flight Test Results

    H. Q. Lee / F. Neuman / G. H. Hardy | NTIS | 1975


    Heliport Critical Area Flight Test Results

    B. R. Billmann / M. M. Webb / J. G. Morrow et al. | NTIS | 1987


    Results of Flight Test with DASA's Integrated Navigation & Landing System

    Meyer-Hilberg, J. / Jacob, T. / Deutsche Gesellschaft fur Ortung und Navigation | British Library Conference Proceedings | 1995