Development of a ship route decision-making algorithm based on a real number grid method

Kim, S.W.; Jang, Hwanchol; Cha, Young-Joon; Yu, Hongjiang; Lee, S.J.; Yu, Duk Jun; Lee, A.R.; Jin, Eunseok

doi:10.1016/j.apor.2020.102230

Cited by 19 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, this study models and analyzes the time domain effects of the environmental loads on propulsion performance of the ship. In Kim's [4,5], Paratap's [6], and Pacheco's [7] research on conventional routing algorithms, the routing algorithm is based on the assumption that the command speed will be maintained in the unit's stage of the route. This assumption can be achieved when a speed governor control is employed.…”

Section: Contributionmentioning

confidence: 99%

“…Additionally, [4][5][6][7] did not consider the variation of the propulsion performance due to time domain effects of the wave loads. In other words, the previous research threats thrust deduction, wake, thrust, and torque as the averaged value without considering the environmental loads.…”

Section: Contributionmentioning

confidence: 99%

“…Accordingly, the combination of each segment gives the solution of whole complicated problem. Kim [5] and Vettor [8] tried to model the ship performance appropriately and improved the 3DDP (Three-Dimensional Dynamic Programming) method. Generally, the route decision making set the single object function as the fuel oil consumption to preserve the efficiency of the voyage while satisfying the safety constraint.…”

Section: State Of the Arts 131 Route Decision Making Algorithmmentioning

confidence: 99%

“…Therefore, the route decision making action would be based on the precise ship performance modeling. There are many studies that model the ship performance into route decision making procedures [5]. There are many efforts to consider while evaluating the ship's routing performance.…”

Section: State Of the Arts 131 Route Decision Making Algorithmmentioning

confidence: 99%

“…The authors attempted to make the hydrodynamic model precise enough to estimate the fuel consumption well the actual sea voyage. In this research, the representative 173,000 m 3 LNG carrier's engine, propulsion, ship response and environmental model test data are referred to in [4,5]. This vessel utilized is a standard LNGC plies all ocean routes.…”

Section: Object Function Modelingmentioning

confidence: 99%

See 4 more Smart Citations

Eco-Friendly Speed Control Algorithm Development for Autonomous Vessel Route Planning

Kim

Yun

You

2021

JMSE

View full text Add to dashboard Cite

The upcoming autonomous vessel voyage is promising future in the maritime sector. However, so far, the contemporary route decision making technologies rely on human intervention. Therefore, this manuscript proposes the two newly developed speed algorithms: the modified fixed speed control and the wave feed forward speed control in the route decision making procedure for the autonomous vessels. These two algorithms can control the vessel’s speed without human intervention in eco-friendly and economic manner. The first algorithm is the wave feed forward speed control that can predict the speed change according to wave loads and compensate it to reduce the fluctuation of speed, power, and fuel consumption. To develop this algorithm, the real time modeling of the wave added resistance and the wave real time effect on propulsion are analyzed. The efficacy of the developed wave feed forward scheme is validated using the in-house route optimization simulation program through comparisons with the results of conventional speed governor control case. The developed schemes are applied to a 173 K LNG (Liquefied Natural Gas) carrier with twin propulsion. The other proposed speed control algorithm is the modified fixed control algorithm. This algorithm improves the conventional fixed power control algorithm by adding a time marching module to satisfy the required time arrival of the voyage. The two proposed methods are analyzed in the various simulations—ideal environmental conditions and real voyage environments: The Pacific and the Atlantic cases. Based on the results, the suggested methods can reduce fuel oil consumption, gas emission, and wear and tear problem of the propulsion devise of ship. In the study, it is clearly demonstrated that the developed wave feed forward speed control and modified fixed power scheme perform much better than the conventional speed governor control case.

show abstract

Section: Contributionmentioning

confidence: 99%

Section: Contributionmentioning

confidence: 99%