Time series prediction of ship course keeping in waves using higher order dynamic mode decomposition

被引：9

作者：

Chen, Chang-Zhe ^{[1
]}

Zou, Zao-Jian ^{[1
,2
]}

Zou, Lu ^{[1
,2
]}

Zou, Ming ^{[1
]}

Kou, Jia-Qing ^{[3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

[3] RWTH Aache Univ, Inst Aerodynam, D-52062 Aachen, Germany

来源：

PHYSICS OF FLUIDS | 2023年 / 35卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Data reduction - Dynamical systems - Forecasting - Ships - Time series;

D O I：

10.1063/5.0165665

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A novel reduced-order model (ROM) based on higher order dynamic mode decomposition (HODMD) is proposed for the time series prediction of ship course-keeping motion in waves. The proposed ROM is validated by using the data of course-keeping tests of an ONR tumblehome ship model. First, modes are decomposed from the model test data by standard DMD and HODMD, and the dominant modes are selected according to the energy index. Then, the decomposed dominant modes are used to reconstruct and predict the dynamics of ship motion. The dynamic characteristics in the dynamical systems are revealed according to the energy index, growth rates, and frequencies of the decomposed modes. In addition, the effects of the tunable parameter in HODMD on prediction accuracy and computational times are analyzed by a parametric study. The prediction results by HODMD show better agreement with the model test data than those by standard DMD.

引用

页数：15

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