An active vibration control method for the multiple trailing-edge flaps configuration is proposed and evaluated via simulation. The concept involves deflecting each individual trailing-edge flap using a compact resonance actuation system. Each resonance actuation system yields high authority, while operating at a single frequency. An aeroelastic model is developed for a helicopter rotor with trailing edge flaps. The rotor blade airloads are calculated using quasi-steady blade element aerodynamics with a free wake model for rotor inflow. A compressible unsteady aerodynamics model is employed to predict the incremental trailing edge flap airloads. Both finite wing effects and actuator saturation are included in the simulation. A numerical simulation has been performed for the resonance actuation system tuned to 4/rev frequency and the steady-state forward flight (My = 0.15-0.35). It is demonstrated that multiple trailing-edge flap configuration with the resonance actuation system can outperform single- and dual-flap configurations by achieving more vibration reduction within available actuator authority. An analysis and parametric study is conducted to explore the finite wing effect of trailing-edge flaps and actuator saturation. Within the available actuator authority, multiple-flap configuration reduces the vibration by 91 % and 79 %, in low- and high-speed flight conditions, while single-flap one does it by 35 % and 56 %.


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    Titel :

    Helicopter vibration suppression via multiple trailing edge flaps controlled by resonance actuation system


    Weitere Titelangaben:

    Schwingungsunterdrückung bei Hubschraubern mittels multipler Hinterkantenklappen und Resonanzansteuerung


    Beteiligte:
    Kim, Jun-Sik (Autor:in) / Smith, Edward C. (Autor:in) / Wang, K.W. (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2004


    Format / Umfang :

    12 Seiten, 22 Bilder, 4 Tabellen, 27 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Helicopter Vibration Suppression via Multiple Trailing Edge Flaps Controlled by Resonance Actuation System

    Kim, J. / Smith, E. C. / Wang, K. W. et al. | British Library Conference Proceedings | 2004


    Helicopter Vibration Reduction with Trailing Edge Flaps

    Milgram, J. / Chopra, I. / American Helicopter Society; Northeast Region | British Library Conference Proceedings | 1995


    Helicopter Vibration Reduction with Trailing Edge Flaps

    Milgram, J. / Chopra, I. / American Helicopter Society; Northeast Region | British Library Conference Proceedings | 1995


    Helicopter Vibration Reduction with Trailing Edge Flaps

    Milgram, J. / Chopra, I. / American Institute of Aeronautics and Astronautics| ASME| ASCE | British Library Conference Proceedings | 1995


    Helicopter vibration reduction with trailing edge flaps

    Milgram, Judah / Chopra, Inderjit | AIAA | 1995