Quantitative Feedback Theory describes a frequency-domain technique for the design of multi-input, multi-output control systems which meet time or frequency domain performance criteria when specified uncertainty exists in the linear description of the vehicle dynamics. Quantitative Feedback Theory is applied to the design of the longitudinal flight control system for a linear uncertain model of the AH-64 rotorcraft. In this model, the uncertainty is assigned, and is assumed to be attrributable to actual uncertainty in the dynamic model and to the changes in the vehicle aerodynamic characteristics which occur near hover. The model includes an approximation to the rotor and actuator dynamics. The design example indivates the manner in which handling qualities criteria may be incorported into the design of realistic rotorcraft control systems in which significant uncertainty exists in the vehicle model.


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    Title :

    Quantitative feedback theory (QFT) applied to the design of a rotorcraft flight control system


    Additional title:

    Quantitative Rückkopplungs-Theorie angewandt in der Auslegung eines Flugsteuerungssystems für Hubschrauber


    Contributors:
    Hess, R.A. (author) / Gorder, P.J. (author)

    Published in:

    Publication date :

    1992


    Size :

    11 Seiten, 13 Bilder, 2 Tabellen, 13 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English