A simple technique for identifying vessel model parameters

Golikov, V. A.; Голіков, В. В.; Volyanskaya, Yana; Mazur, O.; Onishchenko, Oleg

doi:10.1088/1755-1315/172/1/012010

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…Usually, the time constant of a ship is a time when the response reaches 63.21% of the target value. This paper adopts 20 ships data from the paper of Aulia [32], where the T value ranges from 33.36 to 418.60 s. Table 1 provides the necessary information for the 20 different ship types considered in this research. MATLAB Simulink platform has been utilized to create the ship state subsystem in this study, and Equation (1) is solved numerically using Runge-Kutta method to get the state vector X = [r; ψ; x; y] for each time step for given rudder angle, δ.…”

Section: Prediction Of Ship Statementioning

confidence: 99%

COLREGs Compliant Fuzzy-Based Collision Avoidance System for Multiple Ship Encounters

Ahmed

Hannan

Oraby

et al. 2021

JMSE

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As the number of ships for marine transportation increases with the advancement of global trade, encountering multiple ships in marine traffic becomes common. This situation raises the risk of collision of the ships; hence, this paper proposes a novel Fuzzy-logic based intelligent conflict detection and resolution algorithm, where the collision courses and possible avoiding actions are analysed by considering ship motion dynamics and the input and output fuzzy membership functions are derived. As a conflict detection module, the Collision Risk (CR) is measured for each ship by using a scaled nondimensional Distance to the Closest Point of Approach (DCPA) and Time to the Closest Point of Approach (TCPA) as inputs. Afterwards, the decisions for collision avoidance are made based on the calculated CR, encountering angle and relative angle of each ship measured from others. In this regard, the rules for the Fuzzy interface system are defined in accordance with the COLREGs, and the whole system is implemented on the MATLAB Simulink platform. In addition, to deal with the multiple ship encounters, the paper proposes a unique maximum-course and minimum-speed change approach for decision making, which has been found to be efficient to solve Imazu problems, and other complicated multiple-ship encounters.

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Section: Prediction Of Ship Statementioning

confidence: 99%

COLREGs Compliant Fuzzy-Based Collision Avoidance System for Multiple Ship Encounters

Ahmed

Hannan

Oraby

et al. 2021

JMSE

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“…У статті [11] представлений простий спосіб визначення параметрів динамічної математичної моделі судна, вибрана модель Номото 2-го порядку, визначені сталі часу рівняння гідропропульсивного комплексу. Для ідентифікації параметрів моделі пропонується: використання результатів «звивистих» тестів; обробка результатів тестів за допомогою перетворення Фур'є та перевірка результатів на основі «зворотного» моделювання.…”

Section: аналіз останніх досліджень і публікацій в яких започаткованunclassified

Coordinate Method for Determining the Ground Speed of the Vessel by Vectors and Displacement of Relative Speeds

Siniuta¹

2020

SH&N

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During the movement of the vessel along the route there is a problem of observation of natural and man-made obstacles, which is solved by modernizing the management using enavigation. Intensification of the movement process is provided by increasing the number and frequency of observations according to static criteria. In this case, the methods of graphical and analytical calculation of the path are the basis of navigation, forcing a return to the local criterion, which reflects the full physical nature of the process. The calculation of the vessel's path on the route is carried out according to the rule of the polygon, the sides of which are the vectors of the speed of the path, the vessel and perturbations (wind, waves, current). The main problem is the accuracy of determining the magnitude of the perturbation vector. The inaccuracy of the definition leads to the extension of the vessel's path, which contributes to energy and financial losses for transport support and maintenance of the vessel. The aim of the study is to create a reliable, fast and accurate (innovative) way to determine the characteristics of rectilinear gradual uniform motion of the vessel, which features three speed vectors: perturbation, relative and absolute velocities. The object of study was the process of ship movement, and the subject - the elements (parameters) of movement. The article determines the forecast parameters with a minimum of a priori information at the beginning of the vessel: the sequence of determining the angles of the speed triangle is determined, the sides (modules) of the speed triangle are determined, the order of determining the coordinates of the vertices of the velocity triangle is established. This allows to solve more complex problems of graph-analytical and mechatronic calculus and observation of translational and rotational motion of the vessel along the route and to improve control to reduce risk on the course of disturbances in "big" real time, with variable intervals of observations, approaching invariant and robust control. The advantage of the coordinate method is to solve the problem of determining the parameters of vectors by methods of analytical geometry more accurate, proven and simple in comparison with empirical dependencies, as well as geometric constructions

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“…When using mathematical models of ship motion, it is important to determine the values of parameters for the models. There are a number of papers aimed at developing methods for identifying the parameters of mathematical models of ship motion [4,10]. Putranto and Purwanto [26] analyzed rolling damage ship motion caused by wave loads on bulk carrier vessels, providing insights into the effects of wave-induced forces on ship structures.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive Assessment of Hull Geometry Influence of a Modernized Ship on Maneuvering Performance and Propulsion System Parameters

Shumylo,

Yarovenko,

Malaksiano

et al. 2023

Pomorstvo (Online)

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The necessity to preserve economic efficiency of cruise ships operation stipulates fleet modernization in order to avoid expenses on ordering and construction of new ships. In this paper an approach based on hull length increase in the process of ship modernization is discussed. The method of evaluation of changes in maneuvering characteristics of ship after modernization is developed taking into account the operational parameters of propulsive electric power plants. The calculations are based on the analysis of transient modes of propulsive power plants operation during the corresponding maneuvers. The parameters influencing the characteristics of ship motion during turning circle are revealed; their significance is estimated, comparative analysis of the effect of ship hull length on maneuvering parameters before and after modernization is carried out. It was shown that in some cases the characteristics of the ship’s controllability and operating parameters of the ship power plant after modernization remain within the permissible limits. The comparative results show that the increase in hull length leads to insignificant deterioration of the main maneuverability characteristics while the electric power plant indicators practically do not deteriorate, which confirms the expediency of such modernization.

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A simple technique for identifying vessel model parameters

Cited by 14 publications

References 4 publications

COLREGs Compliant Fuzzy-Based Collision Avoidance System for Multiple Ship Encounters

COLREGs Compliant Fuzzy-Based Collision Avoidance System for Multiple Ship Encounters

Coordinate Method for Determining the Ground Speed of the Vessel by Vectors and Displacement of Relative Speeds

Comprehensive Assessment of Hull Geometry Influence of a Modernized Ship on Maneuvering Performance and Propulsion System Parameters

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