NDLI: Short-Term Prediction in Vessel Heave Motion Based on Improved LSTM Model

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Chentong Shao Xiong Hu Weidong Cao Shaoyang Men Gang Tang Jinman Lei
Abstract	In order to solve the problem of control performance degradation caused by time delay in wave compensation control system, predicting vessel heave motion can be the input vector of the control system to alleviate time delay problem. The vessel heave motion belongs to the problem of time series, this paper proposes an improved Long Short-Term Memory (LSTM) model with a random deactivation layer (dropout), which can deal with the time series problem very well. In order to obtain the vessel heave motion, this paper establishes a wave model suitable for marine operation, and solves the vessel heave motion through the mathematical model of vessel motion. Finally, the paper predicts the vessel heave motion in a short predicted time series. In the process of obtaining the prediction effect of vessel heave motion, the Back Propagation (BP) neural network and the standard LSTM neural network are used to compare with the improved LSTM neural network. While the predicted time series is 0.1 s at sea state 3, the mean absolute percentage (MAPE) errors of BP neural network in the prediction of vessel heave motion is $1.06×10^{-2}$%, the standard LSTM in the prediction of heave motion is $1.43×10^{-4}$%, the improved LSTM in the prediction of heave motion is $7.51×10^{-6}$%. The improved LSTM improves MAPE by $1.05×10^{-2}$% compared with the BP and $1.42×10^{-4}$% compared with the standard LSTM. The prediction results show that the improved LSTM has a strong prediction capability with not easily overfitted in vessel heave motion prediction. The results show that the improved LSTM provides a new idea for vessel motion prediction and solves the problem of time delay, which is useful for the study of stability in marine operations.
e-ISSN	21693536
DOI	10.1109/ACCESS.2021.3072420
Journal	IEEE Access
Volume Number	9
Language	English
Publisher	IEEE
Publisher Date	2021-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Electrical Engineering. Electronics. Nuclear Engineering Short-term Prediction Improved Long Short-term Memory (lstm) Time Delay Vessel Heave Motion
Content Type	Text
Resource Type	Article

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