| Maritime autonomous surface ship(MASS)is a new kind of ship that integrates a variety of smart sensors,intelligent technologies and systems.It can be partially or fully operated by a shipboard intelligent system or remotely controlled by a shore-based control center.MASS uses advanced technology and equipment,and has great potential in terms of economy and safety.The European Union,the United Kingdom,Norway,the International Maritime Organization and other countries and organizations have carried out a series of research,making the MASS become a research hotspot worldwide.Based on the research and development history and current situation of MASS at home and abroad,focusing on the three key elements of "MASS,shore-based operators,external navigation environment",this paper establishes the navigation risk index system of MASS under complex navigation conditions,considering the particularity of MASS,its perception ability,environmental understanding,situation judgment,communication ability and other indicators.Analytic hierarchy process(AHP)is used to solve the weight of all kinds of navigation risk factors,and the consistency test of the established index system is carried out.Through expert investigation,the fuzzy membership set of risk indicators is established,and a fuzzy comprehensive evaluation model is established to evaluate the navigation risk of MASS under complex navigation conditions.Because there are many risk factors involved,to avoid the situation of single factor information being inundated,this paper adopts the method of fuzzy comprehensive evaluation from low level to high level,and verifies the algorithm through two cases,which proves the validity and rationality of the proposed risk assessment system.Navigation risk assessment under complex navigation conditions can identify the risk factors affecting the safe navigation of MASS,predict the possible risks in the process of navigation,discover and properly handle the hidden dangers of the vessel navigation at sea,and take necessary safety measures against the possible risk factors to ensure the safety navigation of MASS at sea. |
