An optimization method is used to predict safe, maximum-performance takeoff procedures which satisfy noise constraints at multiple observer locations. The takeoff flight is represented by two-degree-of-freedom dynamical equations with aircraft angle-of-attack and engine power setting as control functions. The engine thrust, mass flow and noise source parameters are assumed to be given functions of the engine power setting and aircraft Mach number. Effective Perceived Noise Levels at the observers are treated as functionals of the control functions. The method is demonstrated by applying it to an Advanced Supersonic Transport aircraft design. The results indicate that automated takeoff procedures (continuously varying controls) can be used to significantly reduce community and certification noise without jeopardizing safety or degrading performance.


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    Title :

    Prediction of noise constrained optimum takeoff procedures


    Contributors:

    Conference:

    Aeroacoustics Conference ; 1980 ; Hartford, CT


    Publication date :

    1980-06-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English