Short-Term Prediction of Ship Motion Based on EMD-SVM

Sun Bo Liu; Ping An Shi; Lei Wu

doi:10.4028/www.scientific.net/AMM.571-572.252

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 571-572Short-Term Prediction of Ship Motion Based on...

Short-Term Prediction of Ship Motion Based on EMD-SVM

Abstract:

Ship sailing at sea is affected by many factors, such as winds, waves and so on, which makes six degrees of freedom motions and thus influences the shipboard arms control, aircraft landing and other operations. In view of the non-linear and non-stationary features of ship motion in waves, a new method based on EMD (Empirical Model Decomposition) and SVM (Support Vector Machine) is presented to predict the ship motion. The EMD is used to decompose the ship motion time series data into several IMFs (intrinsic mode functions) and a residual trend term, which decreases the difficulty of prediction. As the IMF is relatively stationary, but also non-linear, these features are fit to be processed by using SVM. Then the decompositions are used as inputs into SVM to forecast ship motion. The simulation and comparison analysis show that the EMD-SVM prediction model can effectively forecast the ship motion in waves.

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Periodical:

Applied Mechanics and Materials (Volumes 571-572)

Pages:

252-257

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.571-572.252

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Online since:

June 2014

Authors:

Sun Bo Liu, Ping An Shi, Lei Wu

Keywords:

Empirical Mode Decomposition (EMD), Prediction, Ship Motion, Support Vector Machine (SVM)

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