Pilot-induced oscillation (PIO) is an unwanted and inadvertent closed-loop coupling between the pilot and one or more independent response variables of an aircraft. PIO typically results when the pilot attempts to perform a high gain tracking task using the usual cues of acceleration or attitude. Control system and aircraft characteristics within the bandwidth in which the pilot is active can contribute to a coupling between the pilot response and aircraft dynamics. The result is a neutrally damped or undamped out-of-control condition in which the pilot is often making intentional extreme and repetitive inputs in an effort to damp the motion but only serves to enhance it. Pilot-augmented oscillation (PAO) is an unintentional closed-loop coupling which does not involve a tracking task. Another aircraft variable which may lead to PIO or PAO is aeroelastic deformation of the vehicle structure. This elastic response can produce pilot cues or aircraft rigid body motion which can be enhanced when the pilot attempts to damp the oscillation and PIO results. Or, the elastic oscillations alone may lead to PAO. The potential for aeroelastic pilot-in-the-loop coupling is not widely recognized, and this can mean resources expended in ineffectual or nonoptimal solutions to the problem until the aeroelastic source is recognized. This paper will characterize the aeroelastic/pilot coupling phenomena without reproducing the fundamental research which has already been published on more general PIO. Examples of aeroelastic PIO and PAO will be provided to illustrate the various ways in which the phenomena can manifest itself, including recent experiences with the C-17A and the V-22. An examination of the potential for predicting this coupling will also be provided. Lastly, recommendations for flight test methodology to uncover and investigate aeroelastic pilot-in-the-loop coupling will be provided.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Aeroelastic Pilot-in-the-Loop Oscillations


    Beteiligte:
    W. J. Norton (Autor:in)

    Erscheinungsdatum :

    1995


    Format / Umfang :

    14 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Evaluation of Aeroelastic Effects on Pilot-Induced Oscillations via Pilot-in-the-Loop Simulations

    Drewiacki, Daniel / Silvestre, Flavio J. / Guimaraes Neto, Antonio Bernardo | AIAA | 2018


    Evaluation of Aeroelastic Effects on Pilot-Induced Oscillations via Pilot-in-the-Loop Simulations (AIAA 2018-1016)

    Drewiacki, Daniel / Silvestre, Flavio J. / Neto, Antonio Bernardo Guimaraes | British Library Conference Proceedings | 2018




    A closed loop experiment of collective bounce aeroelastic Rotorcraft–Pilot Coupling

    Masarati, Pierangelo / Quaranta, Giuseppe / Lu, Linghai et al. | Tema Archiv | 2014