Indexed by:
Journal Papers
First Author:
Tang, Da
Correspondence Author:
Xu, CC (reprint author), Dalian Univ Technol, Comp Sci & Technol Coll, Dalian 116024, Peoples R China.
Co-author:
Xu, Chuanchuan,Yue, Qianjin,Wu, Wenhua,Shi, Zhongmin,Feng, Jiaguo
Date of Publication:
2015-10-01
Journal:
APPLIED OCEAN RESEARCH
Included Journals:
SCIE、EI、Scopus
Document Type:
J
Volume:
53
Page Number:
250-256
ISSN No.:
0141-1187
Key Words:
Modal parameter; Time-varying system; Single point mooring; Empirical
mode decomposition; Time-varying autoregressive
Abstract:
A method based on empirical mode decomposition (EMD) and time-varying autoregressive (WAR) model is proposed here to identify the modal parameters of time-varying systems, such as the Floating Production Storage and Offloading (FPSO) single point mooring system. For the EMD-TVAR method, the original signal is decomposed into a finite number of 'intrinsic mode functions' (IMFs) by the EMD. Each IMF can be represented as a WAR model. Then, the time-varying modal parameters i.e., instantaneous frequency(IF) and modal dumping, can be obtained by the basis functions expansion method. The proposed EMD-TVAR method has good results in two experiments compared with the Huang-Hilbert transformation and Short Time Fourier Transform method, and it has been used to analysis the modal parameters of FPSO single point mooring system successfully. The system's time-varying characteristic and its frequency distribution can be known from the modal analysis results. (C) 2015 Elsevier Ltd. All rights reserved.
Translation or Not:
no
