A Translational Rate Command (TRC) control law has been developed to enable low speed maneuvering of a large civil tiltrotor with minimal pitch changes by means of automatic nacelle angle deflections for longitudinal velocity control. The nacelle actuator bandwidth required to achieve Level 1 handling qualities in hover and the feasibility of additional longitudinal cyclic control to augment low bandwidth nacelle actuation were investigated. A frequency-domain handling qualities criterion characterizing TRC response in terms of bandwidth and phase delay was proposed and validated against a piloted simulation conducted on the NASA-Ames Vertical Motion Simulator. Seven experimental test pilots completed evaluations in the ADS-33E-PRF Hover Mission Task Element (MTE) for a matrix of nacelle actuator bandwidths, equivalent rise times and control response sensitivities, and longitudinal cyclic control allocations. Evaluated against this task, longitudinal phase delay shows the Level 1 boundary is around 0.4 0.5 s. Accordingly, Level 1 handling qualities were achieved either with a nacelle actuator bandwidth greater than 4 rad/s, or by employing longitudinal cyclic control to augment low bandwidth nacelle actuation.


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    Titel :

    Handling Qualities of a Large Civil Tiltrotor in Hover using Translational Rate Command


    Beteiligte:
    C. A. Malpica (Autor:in) / C. R. Theodore (Autor:in) / B. Lawrence (Autor:in) / J. Lindsey (Autor:in) / C. Blanken (Autor:in)

    Erscheinungsdatum :

    2012


    Format / Umfang :

    21 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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    Malpica, Carlos A. / Theodore, Colin R. / Lawrence, Ben et al. | NTRS | 2012


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    Malpica, C.A. / Theodore, C. / Lawrence, B. et al. | British Library Conference Proceedings | 2012


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