TY - JOUR
T1 - Time-varying system identification using a newly improved HHT algorithm
AU - Bao, C.
AU - Hao, Hong
AU - Li, Z.X.
AU - Zhu, Xinqun
PY - 2009
Y1 - 2009
N2 - A newly improved Hilbert–Huang transform (HHT) algorithm is presented for identification of time-varying systems and analysis of nonlinear structural response with closely spaced modes. In this improved HHT, the auto-correlation function of the structural response is taken as a substitute of input to reduce noise effect. A band-pass filter scheme and an effective intrinsic mode function (IMF) selection principle are combined to overcome the modal perturbation problem. Based on these, a time-varying system identification procedure is developed. Its robustness and effectiveness are verified by both numerically simulated and laboratory measured vibration data on a scaled concrete-steel composite beam model.
AB - A newly improved Hilbert–Huang transform (HHT) algorithm is presented for identification of time-varying systems and analysis of nonlinear structural response with closely spaced modes. In this improved HHT, the auto-correlation function of the structural response is taken as a substitute of input to reduce noise effect. A band-pass filter scheme and an effective intrinsic mode function (IMF) selection principle are combined to overcome the modal perturbation problem. Based on these, a time-varying system identification procedure is developed. Its robustness and effectiveness are verified by both numerically simulated and laboratory measured vibration data on a scaled concrete-steel composite beam model.
U2 - 10.1016/j.compstruc.2009.08.016
DO - 10.1016/j.compstruc.2009.08.016
M3 - Article
SN - 0045-7949
VL - 87
SP - 1611
EP - 1623
JO - Computers and Structures
JF - Computers and Structures
IS - 23-24
ER -