Y. (Yamin) Huang
Yamin Huang is a PhD candidate in Safety and Security Science Group under the supervision of Prof. dr. ir. P.H.A.J.M. van Gelder, dealing with marine traffic risk assessment. He received his Master of Science (MSc) in Traffic Information Engineering and Control, and Bachelor of Engineering (B.Eng) in Maritime Administration from Wuhan University of Technology (WUT).
Yamin’s research focuses on developing a real-time risk assessment model for marine traffic management. Specifically, this research aims at measuring the dynamic collision risk on the sea and supporting the real-time decision making, e.g. traffic control and collision avoidance. This research titled “Maritime Dynamic Risk Assessment for Supporting Situation Awareness”.
Some research related videos can be found below:
- Explanation of Immediate Collison Risk Measurement
Collision risk is a critical indicator for navigators to take evasive actions at sea. Usually, the risk is used to show the danger level of approaching the ship and it strongly relies on mariners experience. Thus, the risk level shows the experts’ belief of collisions. However, the ship manoeuvrability is different from one to another. That means, in the same encountering scenarios, the one with a poor manoeuvrability might have a higher risk than the others.
To measure the risk generated from different manoeuvrability, we proposed an indicator Immediate Collision Risk (ICR). The ICR shows “room-to-manoeuvre” for sailors and indicates the urgent level of approach ships. The ship with a higher ICR implies a lower chance to avoid the collision and the mariner need to pay more attention.
The ICR measurement consists of two parts: velocity obstacle (VO) set and reachable velocity (RV) set. VO set collects all the manoeuvres leading to a collision; RV set contains all the manoeuvres the ship can take before the collision. The manoeuvre mainly refers to velocity, i.e. speed and course. The overlap of VO set and RV set is the manoeuvres that one ship can reach and lead to collision; the complement of VO set in RV set is the collision-free solutions for the ship. The ratio of the overlap and RV set indicates the “room-to-manoeuvre” which is the proposed ICR.
When the RV set is completely contained in a VO set, where the ICR reaches 1. That means, although the collision has not happened yet, the collision is inevitable; When the RV set does not overlap with a VO set, where ICR is 0. That implies the ship does not have a conflict with the approaching ship in the future. Demonstrations of proposed ICR are shown in following videos.
Notes: The RV set is presented as a green region in the first panel; The VO set is bounded by deep red line in the second panel; The encountering scenario is displayed in the third panel; the last panel shows the ICR level over time.
Risk of own ship encountering with one ship at anchor
Risk of own ship encountering with one ship in Crossing Scenario
Risk of own ship encountering with one ship in Heading Scenario
Risk of ownship encountering with two crossing ships
- Y. Huang, P.H.A.J.M. van Gelder and Y. Wen. 2018. "Velocity Obstacle Algorithms for Collision Prevention at Sea." Ocean Engineering 151: 308-321.
- Y. Huang, P.H.A.J.M. van Gelder, M.B. Mendel. (2016). Imminent ships collision risk assessment based on velocity obstacle. ESREL 2016: Risk, Reliability and Safety: Innovating Theory and Practice. Lesley Walls, Matthew Revie and T. Bedford. Glasgow (UK), Taylor & Francis Group.
- Y. Wen, Y. Huang, et al. (2015). "Modelling of marine traffic flow complexity." Ocean Engineering 104: 500-510.