Abstract
With vigorous development of the maritime trade, many intelligent algorithms have been proposed to avoid collisions due to resulting casualties and increased costs. According to the international regulations for preventing collisions at sea (COLREGs) and the self-evolution ability of the intelligent algorithm, the collision avoidance trajectory can be more consistent with the requirements of reality and maritime personnel. In this paper, the optimization of ship collision avoidance strategies is realized by both an improved multiobjective optimization algorithm NSGA-II and the ship domain under the condition of a wide sea area without any external disturbances. By balancing the safety and economy of ship collision avoidance, the avoidance angle and the time to the action point are used as the variables encoded by the algorithm, and the fuzzy ship domain is used to calculate the collision avoidance risk to achieve collision avoidance. The simulation results show that the proposed method can optimize the ship collision avoidance strategy and provide a reasonable scheme for ship navigation.
Highlights
Collisions are one of the biggest problems in terms of safe navigation at sea
The method mentioned above has been programmed in the Matlab software, whose good image visualization ability is used to display the simulation results with a graphical user interface (GUI)
The parameters of the algorithm are defined in the previous chapter, and information of the target ship can be obtained through the automatic radar plotting aid (ARPA)
Summary
Collisions are one of the biggest problems in terms of safe navigation at sea. With the development of science and technology, a substantial amount of equipment has been developed to avoid collisions, such as the automatic identification system (AIS), automatic radar plotting aid (ARPA), and global positioning system (GPS) [1, 2]. Risk discernment between the DCPA and TCPA cannot sufficiently reflect the occurrence of collisions; namely, these methods cannot consider the information of a target ship and the opportune moment. To solve this problem, Szlapczynski introduced two new parameters in the field of ships: the degree of domain violation (DDV) and the time to domain violation (TDV), which were used to replace the DCPA and TCPA [14]. The collision risk is determined by the principle of nonaggression on the two ship domains, and the related parameters are calculated as follows. 210∘ Figure 3: Chart divisions showing the encounter status of the ship
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
