Projects per year
Abstract
Ship collision attracts prevalent attention due to its high occurrence frequency and severe potential conse-quence. It is therefore of pressing importance to prevent ship collision at sea for safe maritime transporta-tion. Non-linear Velocity Obstacle (NL-VO) algorithm has received increasing attention in maritime colli-sion avoidance by taking the dynamics of ship action during the encounter process into consideration. How-ever, one precondition of NL-VO algorithm is that the trajectory of target ship needs to be known in ad-vance, which makes the application of this algorithm limited in the historical ship collision risk analysis ra-ther than the in real-time collision avoidance. Although the generalized velocity obstacle algorithm over-comes this limitation using the trajectory prediction module, the trajectory uncertainty of the target ship is not discussed leading to the possible inaccurate collision risk assessment. Therefore, this paper presents a real-time collision risk assessment method based on an improved NL-VO algorithm by including the uncer-tainty analysis of the target ship’s predicted trajectory. The proposed method consists of two main modules: trajectory uncertainty module assumes that the increase in the radius of the circular restricted area is con-sistent with the Wiener process; collision risk assessment module utilizes the non-linear velocity obstacle algorithm combined with the dynamic circular restricted area to evaluate the potential collisions. Several encounter scenarios in a specific port channel are designed to demonstrate the feasibility of using this pro-posed method to assess ship collision risk in real-time. The result shows that this improved NL-VO algo-rithm can timely identify a ship that is in danger of colliding with the own ship and know when the collision will occur, which contributes to reducing ship collision occurrence probability.
Original language | English |
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Title of host publication | Developments in the Collision and Grounding of Ships and Offshore Structures |
Editors | Carlos Guedes Soares |
Pages | 293-300 |
Number of pages | 8 |
ISBN (Electronic) | 9781003002420 |
Publication status | Published - 2020 |
MoE publication type | A4 Article in a conference publication |
Event | International Conference on Collision and Grounding of Ships and Offshore Structures - Lisbon, Portugal Duration: 21 Oct 2019 → 23 Oct 2019 Conference number: 8 |
Publication series
Name | Proceedings in Marine Technology and Ocean Engineering |
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Publisher | CRC Press Taylor & Francis Group, A BALKEMA BOOK |
Volume | 4 |
ISSN (Print) | 2638-647X |
ISSN (Electronic) | 2638-6461 |
Conference
Conference | International Conference on Collision and Grounding of Ships and Offshore Structures |
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Abbreviated title | ICCGS |
Country | Portugal |
City | Lisbon |
Period | 21/10/2019 → 23/10/2019 |
Keywords
- collision risk
- NL-VO algorithm
- trajectory uncertainty
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Projects
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RESET: REliability and Safety Engineering and Technology for large maritime engineering systems
01/05/2017 → 30/04/2021
Project: EU: Framework programmes funding
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D4V
Bergström, M., Du, L., Kujala, P., Basnet, S., Chaal, M. & Sormunen, O.
01/12/2016 → 30/06/2019
Project: Business Finland: Other research funding