Large-amplitudeself-sustaining periodic oscillationshavebeen observed in an unforced pitch-axis single-degreeof-freedom dynamic wind-tunnel rig. These limit-cycle oscillations and the associated bifurcations are caused by aerodynamic phenomena and have been studied by constructing experimental bifurcation diagrams,where a system parameter (horizontal tailplane deÂ� ection) is varied quasi statically and the steady-state response of the system recorded. An innovative strategy based on these bifurcation diagramsis then used to identify amathematical model of the rig aerodynamics over a wide operating region. Good agreement is shown between numerical simulations of the theoreticalmodeland experimental time histories over a large range of angle-of-attackand tailplane deÂ� ections.
|Translated title of the contribution||Experimental analysis and modeling of limit cycles in a dynamic wind-tunnel rig|
|Pages (from-to)||776 - 785|
|Number of pages||10|
|Journal||Journal of Aircraft|
|Publication status||Published - Jul 2003|