In this paper we offer a general theory of rotorcraft trim. The theory is set in the context of control theory. It allows for completely arbitrary trim controls and trim settings for multi-rotor aircraft with tests to ensure that a system is trimmable. In addition, the theory allows for 'optimal trim' in which some variable is minimized or maximized rather than set to a specified value. The theory shows that sequential trim cannot work for free flight. The theory is not tied to any particular trim algorithm; hut, in this paper, it is exercised with periodic shooting to show how free-flying rotorcraft can be trimmed in a variety of ways (zero yaw, zero pitch, zero roll, minimum power, etc.) by use of the general theory. The paper also discusses applications to harmonic balance and auto-pilot trim techniques.


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    Title :

    General Theory of Rotorcraft Trim


    Contributors:
    D. A. Peters (author) / D. Barwey (author)

    Publication date :

    1996


    Size :

    35 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    A general theory of rotorcraft trim

    Peters, David / Barwey, Dinesh | AIAA | 1995


    A general theory of rotorcraft trim

    Peters, D.A. / Barwey, D. | Tema Archive | 1995


    A General Thoery of Rotorcraft Trim

    Peters, D. / Barwey, D. / American Institute of Aeronautics and Astronautics| ASME| ASCE | British Library Conference Proceedings | 1995