Ground effect on rigid-elastic coupling flutter of flying-wing aircraft

It contains the root locus distribution results of the rigid-elastic coupled aeroservoelastic model considering ground effect. The rootData_dh05 matrix provides the eigenvalues of the model at a ground clearance of 0.5 MAC; the odd columns represent the real parts of the eigenvalues at various airspeeds, while the even columns represent the corresponding imaginary parts. The matrices rootData_dh1, rootData_dh2, and rootData_dhInf share this exact column arrangement (odd columns for real parts, even columns for imaginary parts across respective airspeeds), representing the eigenvalues of the rigid-elastic coupled model at ground clearances of 1 MAC, 2 MAC, and infinity, respectively.The file "fftData_U30_hc05vsInf.dat" is provided in plain text format and can be accessed directly using any standard text editor.

It contains the Fast Fourier Transform (FFT) spectrum analysis results of the wingtip acceleration response under control surface sweep excitation, specifically for the rigid-elastic coupled aeroservoelastic model operating at a flight condition with an airspeed of 30 m/s. In this file, the 1st and 2nd columns correspond to the frequency and amplitude of the FFT spectrum at a ground clearance of 0.5 MAC, while the 3rd and 4th columns correspond to the frequency and amplitude of the FFT spectrum at an infinite ground clearance (out of ground effect).