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- W2892085325 abstract "Unsteady aerodynamics modeling must accurately describe nonlinear aerodynamic characteristics in addition to unsteady aerodynamic characteristics. The Volterra series has attracted increasing attention as a powerful tool for nonlinear system modeling. It is essential to incorporate the influence of the second-order Volterra kernel or higher-order kernels to build a nonlinear unsteady aerodynamics model. The main difficulty in the identification of higher-order kernels is that the number of parameters to be identified increases exponentially with the order of a kernel. This paper expands the Volterra kernels with the four-order B-spline wavelet on the interval as the basis function, converts the problem into the solution of low-dimensional equations, and obtains a stable solution. A nonlinear unsteady aerodynamics model is built by identifying the second-order and third-order kernels of the lift, drag, and pitching moment coefficients of the NACA0012 airfoil. Then the model is verified at different reduced frequencies using CFD." @default.
- W2892085325 created "2018-09-27" @default.
- W2892085325 creator A5056574822 @default.
- W2892085325 creator A5067202837 @default.
- W2892085325 date "2018-01-01" @default.
- W2892085325 modified "2023-09-27" @default.
- W2892085325 title "Unsteady aerodynamics modeling using Volterra series expansed by basis function" @default.
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- W2892085325 doi "https://doi.org/10.1051/matecconf/201819803002" @default.
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