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dc.contributor.authorGong, Z.en
dc.contributor.authorAraujo-Estrada, Sergio A.en
dc.contributor.authorLowenberg, M. H.en
dc.contributor.authorNeild, Simonen
dc.contributor.authorGoman, M. (Mikhail G.)en
dc.date.accessioned2018-12-06T15:37:46Z
dc.date.available2018-12-06T15:37:46Z
dc.date.issued2019-01-11
dc.identifier.citationGong, Z., Araujo-Estrada, S.A., Lowenberg, M. H., Neild, S., Goman, M. (2019) Experimental Investigation of Aerodynamic Hysteresis Using a Five-Degree-of-Freedom Wind-Tunnel Maneuver Rig. Journal of Aircraft, 56 (3)en
dc.identifier.issn0021-8669
dc.identifier.urihttp://hdl.handle.net/2086/17326
dc.descriptionOpen Access articleen
dc.description.abstractThe high-incidence aerodynamics of a lightweight jet trainer aircraft model has been investigated using a novel five-degree-of-freedom (DOF) dynamic maneuver rig, recently updated with improved actuation and data acquisition systems, in the 7 × 5 ft closed-section low-speed wind tunnel at the University of Bristol. The major focus was to identify the nonlinear and unsteady aerodynamic characteristics specific to the stall region and which affect free-to-move aircraft-model behavior. First, the unstable equilibrium states in the limit-cycle regions were stabilized, and so observed, over a wide range of angles of attack using a simple elevator feedback control lawbased on pitch angle and pitch-rate sensor measurements. Tests with two DOF, namely, the aircraft model and rig-arm pitch angles, revealed the existence of static hysteresis in the normal force acting on the aircraft model in the stall region. Unlocking the aircraft model in roll and yaw accompanied by feedback stabilization of the lateral–directional modes of motion demonstrated the onset of asymmetric aerodynamic rolling and yawing moments in this four-DOF configuration. This observation implicitly indicates a link between the static hystereses in the normal aerodynamic force with an onset of aerodynamic asymmetry. The experimental results show the efficiency of the updated multi-DOF actively controlled maneuver rig in providing insight into complicated aerodynamic effects within the stall region.en
dc.language.isoenen
dc.publisherAIAAen
dc.subjecthigh incidence aerodynamicsen
dc.subjecta lightweight jet trainer aircraften
dc.subjecta 5-DoF wind tunnel manoeuvre rigen
dc.subjectaerodynamic static hysteresisen
dc.subjectan onset of aerodynamic asymmetryen
dc.titleExperimental investigation of aerodynamic hysteresis using a 5-DoF wind tunnel manoeuvre rigen
dc.typeArticleen
dc.identifier.doihttps://doi.org/10.2514/1.c034995
dc.researchgroupInstitute of Engineering Sciences (IES)en
dc.peerreviewedYesen
dc.funderN/Aen
dc.projectidN/Aen
dc.cclicenceCC-BY-NCen
dc.date.acceptance2018-10-16en


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