Transonic Aerodynamic Load Modeling of X-31 Aircraft Pitching Motions

摘要: The generation of reduced-order models for computing the unsteady and nonlinear aerodynamic loads on an aircraft from pitching motions in transonic speed range is described. considered are based Duhamel’s superposition integral using indicial (step) response functions, Volterra theory kernels, radial basis a surrogate-based recurrence framework, both time-history simulations training maneuver(s). Results reported X-31 configuration with sharp leading-edge cranked delta wing geometry, including canard/wing vortex interactions. validity various studied was assessed by comparison model outputs time-accurate computational-fluid-dynamics new maneuvers. Overall, were found to produce accurate results, although functions yielded best accuracy among all models. This model, along time-dependent surrogate approach, helped pr...