This paper describes the formulation and validation of a high-order linearized mathematical model of helicopter flight mechanics, which includes rotor flap and lag degrees of freedom as well as inflow dynamics. The model is extracted numerically from an existing nonlinear, blade element, real-time simulation model. Extensive modifications in the formulation and solution process of the nonlinear model, required for a theoetically rigorous linearization, are described in detail. The validation results show that the linearized model successfully captures the coupled rotor-fuselage dynamics in the frequency band most critical for the design of advanced flight control systems. Additional results quantify the extent to which the order of the model can be reduced without loss of fidelity.


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    Title :

    High-order state space simulation models of helicopter flight mechanics


    Contributors:


    Publication date :

    1993-10-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    High-order state space simulation models of helicopter flight mechanics

    Kim, Frederick D. / Celi, Roberto / Tischler, Mark B. | NTRS | 1990


    Formulation and validation of high-order linearized models of helicopter flight mechanics

    Kim, Frederick D. / Celi, Roberto / Tischler, Mark B. | NTRS | 1990