Autoregressive spectrum-guided variational mode decomposition for time-varying modal identification under nonstationary conditions

• Published in: Engineering structures Vol. 251; p. 113543
• Main Authors: Yao, Xiao-Jun, Yi, Ting-Hua, Qu, Chun-Xu
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.01.2022; Elsevier BV
• Subjects: Accuracy; Damage detection; Decomposition; Frequency distribution; Identification; Identification methods; Modal identification; Nonstationary excitation; Structural health monitoring; System identification; Time varying control systems; Time-varying structure; Variational mode decomposition; Nonstationary excitation; Variational mode decomposition; Modal identification; Time-varying structure
• ISSN: 0141-0296; 1873-7323
• DOI: 10.1016/j.engstruct.2021.113543

•The modal identification of nonstatinary and time-varying conditions are investigated by an improved variational mode decomposition method.•Determining the initial center frequency that is near the real center frequency of the mode is effective to improve the performance of variational mode decompo...