Time-domain TPA Method Based on AKF.

When time-domain TPA methods used for tackling vibrations and noise problems in omplex systems during transient conditions, which failed to overcome the ill-conditioned problems of he frequency response functions matrix near natural frequencies, and showed low accuracy in extrac¬ing the required time-domain information from the existing frequency-domain data. Therefore, a new time-domain TPA method was developed based on AKF. This method started with estimating time-domain operational loads using AKF supplemented by GA, and then identified the impulse response unctions using LS algorithm. Finally, time-domain contributions for each transfer path was computed by linearly convolving time-domain operational loads with respective impulse response functions. Case tudy demonstrates that the load-identification errors of AKF applied in the proposed method are smaller than that of traditional deconvolution filters. Additionally, the errors of impulse response unctions identified by LS algorithm are smaller than those obtained by direct inverse fast Fourier ransform or creating finite impulse response filters from frequency response functions. Furthermore, he proposed method achieves small errors even in complex structures. [ABSTRACT FROM AUTHOR]