Numerical simulations of a two-dimensional airfoil, controlled by an applied moment in pitch and an airfoil controlled by jets, were investigated. These simulations couple the Reynolds-averaged Navier-Stokes equations and Euler's equations of rigid body motion, with an active control system. Controllers for both systems were designed to track altitude commands and were evaluated by simulating a closed-loop altitude step response using the coupled system. The airfoil controlled by a pitching moment used an optimal state feedback controller. A closed-loop simulation, of the airfoil with an applied moment, showed that the trajectories compared very well with quasi-steady aerodynamic theory, providing a measure of validation. The airfoil with jets used a controller designed by robust control methods. A linear plant model for this system was identified using open-loop data generated by the nonlinear coupled system. A closed-loop simulation of the airfoil with jets, showed good tracking of an altitude command. This simulation also showed oscillations in the control input as a result of dynamics not accounted for in the control design. This research work demonstrates how computational fluid dynamics, coupled with rigid body dynamics, and a control law can be used to prototype control systems in problematic nonlinear flight regimes.


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    Titel :

    Simulation of a Controlled Airfoil with Jets


    Beteiligte:
    Allan, Brian G. (Autor:in) / Holt, Maurice (Autor:in) / Packard, Andrew (Autor:in)

    Erscheinungsdatum :

    1997-10-01


    Medientyp :

    Preprint


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :


    Simulation of a Controlled Airfoil with Jets

    Brian G. Allan / Maurice Holt / Andrew Packard | AIAA | 1998


    Simulation of a controlled airfoil with jets

    Allan, Brian / Holt, Maurice / Packard, Andrew | AIAA | 1997


    Simulation of a Controlled Airfoil with Jets

    B. G. Allan / M. Holt / A. Packard | NTIS | 1997


    Simulation of a Controlled Airfoil with Jets

    Allan, B. G. / Holt, M. / Packard, A. et al. | British Library Conference Proceedings | 1997


    Simulation of a Controlled Airfoil with Jets

    Allan, B.G. | Online Contents | 1998