Cooperative Maneuvering Mathematical Modeling for Multi-Tugs Towing a Ship in the Port Environment

Wu, Gongxing; Zhao, Xiaolong; Sun, Yougang; Wang, Linling

doi:10.3390/jmse9040384

Cited by 14 publications

(9 citation statements)

References 12 publications

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“…Furthermore, such a study is a valuable contribution to further studies on determining the appropriate speed of vessels in the port area, as pilots are an essential link in solving the problem of berth allocation or controlling large vessels by tugs and other stakeholders in manoeuvring. [ 37 , 38 ]. It is important to point out that virtually all studies are linked to real-world circumstances that may involve local authorities and industries.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Marine-Pilot Biometric Data Recordings during Port-Approach Using a Full-Mission Simulator

Žagar

Svetina

Brčko

et al. 2022

Sensors

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The purpose of this study is to analyse data from the marine pilots’ bio-sensor readings to determine how experience affects their biometrical response during the port approach. The experiences play a significant role in the participant’s decision-making process and correlate with the repetitions. Through the repetitions of the experimental task, the participants gain experience, which correlates with the biometrical response, e.g., heart rate, electrodermal activity, etc. After exposing the two experience-distinct groups of participants to the same simulated port-approaching task, their collected biometric data is analysed and discussed. The results show that biometrical readings of the less experienced participants typically vary compared to that of the experienced participants, who take the simulated task more seriously. The study also yields insight into the workload process, involving disturbing factors during the task.

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Section: Discussionmentioning

confidence: 99%

Analysis of Marine-Pilot Biometric Data Recordings during Port-Approach Using a Full-Mission Simulator

Žagar

Svetina

Brčko

et al. 2022

Sensors

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“…In 2018, the Guidelines for Mooring Equipment also clearly stated that the rupture of a ship's cable poses a great threat to the safety of personnel in the mooring area and that appropriate measures should be taken to minimise the hidden dangers [6][7][8]. For this reason, reducing the risk of cable rupture accidents in complex mooring conditions has become a major safety issue that needs to be urgently addressed in port operations [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Bollard Force Study Based on Vibration Frequency Method

Zhou,

Liu,

Zhang

et al. 2024

Water

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Existing bollard force measurement methods have not yet been able to realise simple, accurate, and efficient measurements of the bollard force of a single ship’s cable. In this paper, an experimental study on the measurement of ship bollard force is carried out with reference to the calculation method of measuring the cable force of a diagonal cable. Based on the fundamental frequency method and the frequency difference method, a new comprehensive method is proposed to detect the fundamental frequency of cable vibration. A study on the identification of the cable condition based on the measured vibration data is also carried out. Experimental studies on the error rate of different data acquisition positions, excitation methods, excitation positions, wetted cables, different temperatures, and other influencing factors were conducted, and a new excitation method based on environmental excitation and artificial excitation was proposed. By analysing the calculated values of the vibration frequency method and the tensile values of the prototype test platform, it is concluded that the data acquisition position, excitation position, and excitation method have a small influence on the measured value of the ship’s bollard force, and the range of the error rate increases by about 1.5% under the wetting of the cable and ±2% under the low temperature (2 °C), with the integrated error range of −5% to 4%, and the error rate can satisfy the normal distribution well, and the measurement accuracy is corrected by correcting the length of the cable. The measurement accuracy is corrected by correcting the cable length. It is proved that the method has strong feasibility and applicability, and can effectively realise simple, accurate, and efficient measurement of ship bollard force.

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“…In the study of wind, current and waves, a variety of calculation formulas for wind, current and wave interference forces and moments have been proposed [ 13 , 14 ]. For example, Wu et al [ 15 ], Zhao Qiaosheng [ 16 ] and Min Guk Seo [ 17 ] have, respectively, studied the empirical formulas for wind, current and wave forces and moments. However, the described formulas involve complicated hydrodynamic parameters and detailed ship type data, which are usually difficult to obtain and cannot be directly applied to the ship trajectory generator.…”

Section: Introductionmentioning

confidence: 99%

Ship Trajectory Generator under the Interference of Wind, Current and Waves

Ding

Bian²,

Ma³

et al. 2022

Sensors

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In view of the low accuracy of the motion parameters generated by the typical ship trajectory generator, and the fact that the problem of wind, current and wave interference is not considered, this paper establishes a new ship trajectory generator by analyzing the changes in the ship’s attitude and speed under different motion states. Through simulation, the accuracy of the main motion parameters is significantly improved compared with the typical trajectory generator; the time-varying non-uniform wind, current and wave fields are constructed, and the interference effect of wind, current and waves on ship motion is analyzed by combining the empirical formulas of force and moment; an adaptive neuro fuzzy inference system (ANFIS) based on wind, current and wave interference is designed, and the fuzzy rules of the fuzzy system are determined by training and testing the measured data; the motion parameters of superimposed wind, current and wave interference are compared with the measured data, and the accuracy is further improved after superimposing wind, current and wave interference.

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Cooperative Maneuvering Mathematical Modeling for Multi-Tugs Towing a Ship in the Port Environment

Cited by 14 publications

References 12 publications

Analysis of Marine-Pilot Biometric Data Recordings during Port-Approach Using a Full-Mission Simulator

Analysis of Marine-Pilot Biometric Data Recordings during Port-Approach Using a Full-Mission Simulator

Bollard Force Study Based on Vibration Frequency Method

Ship Trajectory Generator under the Interference of Wind, Current and Waves

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