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Showing 1 to 6 of 6 for “"Wing Rock"”.
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Aircraft wing rock dynamics and control
The dynamics of wing rock on rigid aircraft having single, two, and three rotational degrees-of-freedom are analyzed. For the purpose of the analysis, nonlinear mathematical models of the aircraft are developed. The aerodynamic expressions contained in the models can be built by fitting the …
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Two-degree-of-freedom subsonic wing rock and nonlinear aerodynamic interference
… One example is the phenomenon of subsonic wing rock. A method has been developed that accurately simulates the pitching and rolling motions and accompanying unsteady flowfield for a slender delta wing. The method uses a predictor-corrector technique in conjunction with the general unsteady …
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Dynamic recurrent neural networks for stable adaptive control of wing rock motion
Wing rock is a self-sustaining limit cycle oscillation (LCO) which occurs as the result of nonlinear coupling between the dynamic response of the aircraft and the unsteady aerodynamic forces. In this thesis, dynamic recurrent RBF (Radial Basis Function) network control methodology is proposed to …
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An Investigation of Unsteady Aerodynamic Multi-axis State-Space Formulations as a Tool for Wing Rock Representation
… with the equations of motion to simulate wing rock. The unsteady aerodynamic models with state equation representations investigated are functional approaches to modeling aerodynamic phenomena, not directly derived from the physical principles of the problem. They are thought to have …
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Measurement of unsteady aerodynamic characteristics of a subscale aerobatic aircraft in high angle-of-attack maneuvers
… Sukhoi, which is a 35% scale, 2.6 m (102 in) wingspan Sukhoi 29S electric model aircraft that was developed at the University of Illinois at Urbana-Champaign. The aircraft was instrumented with a custom sensor data acquisition system that allowed the motion and control inputs of the aircraft …
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A vortex panel method for potential flows with applications to dynamics and controls
… pressure distribution on the surface while allowing the wake to roll up as tightly as needed. The wake position is determined as part of the solution and no prior knowledge of the position or strength is assumed. An adaptive grid technique is used to redistribute the circulation of the vortex …