TY - JOUR
T1 - Analysis tools for the detection of intermittent nonlinear aeroelastic phenomena
AU - Chabalko, Christopher C.
AU - Ge, Zhongfu
AU - Hajj, Muhammad R.
AU - Silva, Walter A.
PY - 2005
Y1 - 2005
N2 - Wavelet-based higher order spectral moments are implemented to detect the intermittent characteristics of nonlinear couplings in the experiments conducted in the Langley Transonic Dynamics Tunnel (TDT) at the NASA LaRC on a Flexible Semispan Model (FSM) of a High Speed Civil Transport (HSCT) wing configuration. The results show that right before "hard" flutter took place, the aerodynamic load and the structural motion of the FSM were intermittently and quadratically coupled. Because of the required averaging in implementing them, Fourier-based higher order spectral moments could not characterize this coupling. The wavelet analysis procedures presented here could be used for the detection of intermittent or transient nonlinear aeroelastic phenomena as would be encountered in flight tests.
AB - Wavelet-based higher order spectral moments are implemented to detect the intermittent characteristics of nonlinear couplings in the experiments conducted in the Langley Transonic Dynamics Tunnel (TDT) at the NASA LaRC on a Flexible Semispan Model (FSM) of a High Speed Civil Transport (HSCT) wing configuration. The results show that right before "hard" flutter took place, the aerodynamic load and the structural motion of the FSM were intermittently and quadratically coupled. Because of the required averaging in implementing them, Fourier-based higher order spectral moments could not characterize this coupling. The wavelet analysis procedures presented here could be used for the detection of intermittent or transient nonlinear aeroelastic phenomena as would be encountered in flight tests.
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U2 - 10.2514/6.2005-1858
DO - 10.2514/6.2005-1858
M3 - Conference article
AN - SCOPUS:28844455636
SN - 0273-4508
VL - 1
SP - 692
EP - 703
JO - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
JF - Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 46th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
Y2 - 18 April 2005 through 21 April 2005
ER -