Presents the results of a study into the use of Hinfinity -optimisation for the design of robust feedback control laws for improving the handling qualities of high-performance helicopters. A low-speed controller was designed to give accurate control of pitch and roll attitude yaw rate and heave velocity for a typical combat helicopter. The design was based on a linearised model obtained from a six-degree-of-freedom nonlinear model of a helicopter. Robustness was a major issue because rotor dynamics were not included in the design model. Numerical compliance of the design with handling qualities requirements was assessed by testing simulated responses against specifications from a proposed airworthiness design standard. Robust stability was assessed from singular-value plots. In addition, the qualitative features of the design were assessed in a piloted flight simulation trial held at RAE, Bedford.


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    Title :

    Improvement of helicopter handling qualities using Hinfinity -optimisation


    Additional title:

    Verbesserung des Hubschrauber-Handhabungssystems durch Systemoptimierung


    Contributors:
    Yue, A. (author) / Postlethwaite, I. (author)


    Publication date :

    1990


    Size :

    15 Seiten, 28 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





    Helicopter Handling Qualities

    Ford, Terry | Emerald Group Publishing | 1989



    Helicopter Handling Qualities : Proceedings

    NASA Ames Research Center / American Helicopter Society | TIBKAT | 1982