Prediction of Barge Ship Roll Response Amplitude Operator Using Machine Learning Techniques

• Published in: Han-guk haeyang gonghak hoeji (Online) Vol. 34; no. 3; pp. 167 - 179
• Main Authors: Lim, Jae Hwan, Jo, Hyo Jae
• Format: Journal Article
• Language: Korean
• Published: 2020
• Subjects: Standard deviation (SD); Barge type ship; Root mean square error (RMSE); Deep neural network DNN; Machine learning; Response amplitude operator (RAO); Roll Motion
• ISSN: 1225-0767; 2287-6715

Recently, the increasing importance of artificial intelligence (AI) technology has led to its increased use in various fields in the shipbuilding and marine industries. For example, typical scenarios for AI include production management, analyses of ships on a voyage, and motion prediction. Therefore, this study was conducted to predict a response amplitude operator (RAO) through AI technology. It used a neural network based on one of the types of AI methods. The data used in the neural network consisted of the properties of the vessel and RAO values, based on simulating the in-house code. The learning model consisted of an input layer, hidden layer, and output layer. The input layer comprised eight neurons, the hidden layer comprised the variables, and the output layer comprised 20 neurons. The RAO predicted with the neural network and an RAO created with the in-house code were compared. The accuracy was assessed and reviewed based on the root mean square error (RMSE), standard deviation (SD), random number change, correlation coefficient, and scatter plot. Finally, the optimal model was selected, and the conclusion was drawn. The ultimate goals of this study were to reduce the difficulty in the modeling work required to obtain the RAO, to reduce the difficulty in using commercial tools, and to enable an assessment of the stability of medium/small vessels in waves.