A rotary wing aircraft (10) is provided including a dual counter-rotating, coaxial rotor system (12) having an upper rotor system (16) and a lower rotor system (18) rotatable about a common axis (A). A plurality of blade assemblies (20) is mounted to a portion of either the upper rotor system (16) or the lower rotor system (18). A plurality of individually controllable actuators (38) is coupled to each of the plurality of blade assemblies (20). Each of the plurality of actuators (38) is configured to control movement of the coupled blade assembly (20) about a pitch axis (P). The rotary-wing aircraft (10) additionally includes a sensor system (56) within an airframe (F). A higher harmonic control (HHC) controller (54) is arranged in communication with the sensor system (56) and the plurality of actuators (38) to individually control the upper rotor system (16) and the lower rotor system (18) to reduce vibration.


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    Title :

    Vibration control of a swashplateless coaxial rotor


    Additional title:

    Schwingungssteuerung eines taumelscheibenlosen Koaxialrotors
    Contrôle des vibrations d'un rotor coaxial sans plateau cyclique


    Contributors:

    Publication date :

    2017-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B64C AEROPLANES , Flugzeuge



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