Research On Analyzing AIS Ship Track And Reproducing Simulation System Of Ship Accident

VDR is an important way to obtain survey data of modern ship accidents,but some ships have not yet installed VDR.A network system,integrated ship with shore to send and receive information based on AIS,provides a condition for ship accident reproduction based on AIS ship track.This paper studies AIS ship track processing and exception analysis,three-dimensional modeling and simulating system of ship accident reproduction to provide assistant analysis to the ship accident investigation under circumstances like uninstalled VDR,incomplete AIS ship track and ship data falling short of modeling accuracy requirements of ship motion model.The main research work of this paper is as follows:1.Determining the research methods and examples.This paper elaborates the background,purpose and significance of the study of AIS ship track application,summarizes AIS ship track application and the simulation of ship accident reproduction at home and abroad,and declares research methods and thoughts.2.Processing and analyzing AIS ship track.Owing to the unevenness and large intervals of the AIS ship track data of the accident ship,this paper applys AIS ship track interpolation method to interpolate ship track data by considering ship course and speed based on analyzing and comparing current methods of AIS ship track processing,adopts improved Kalman Filtering algorithms to realize the optimization of AIS ship track interpolation by theoretically analyzing and comparing of traditional with improved Kalman Filtering algorithms in terms of features,and preliminary discusses the basic method and viability of exceptional ship track analyzation based on ship heading,and the change trend of speed and course over the ground of AIS ship track data,so as to guarantee the continuous,smooth and fluent demostration of the ship track of three-dimensional reproduction system.3.Studying the reproduction and simulation system of ship accident.Considering the possible circumstances like incomplete data and extreme weather resulted in difficulties to reproduce ship accident by force analysis and modeling of ship motion during the ship accident investigation,this paper uses C#programming technique to develop subsystem of two-dimensional ship track and to realize the two-dimensional reproducing demonstration of ship accident.Also,based uopn GIS simulation technique and MultigenCreator,it provids visualized three-dimensional virtual scene for three-dimensional GIS simulation subsystem,and assists in the completion of three-dimensional GIS simulation subsystem of ship accident by modeling ship hull and virtual environment to simulate the true environment.4.Applying the research of ship accident simulation reproduction to Dongfangzhixing.By using the methods of AIS ship track interpolation picked from 2,this paper interpolates 3s as time interval of AIS ship track of Dongfangzhixing,and the data resulted from it is used as track data of modelled ship in 3 ship accident reproducing simulation system to reproduce two-dimensional ship track.Besides,it provides assistant analysis to the ship accident investigation by linking three-dimensional GIS simulation system with two-dimensional ship track subsystem to demonstrate ship navigation and overturn process from a three-dimensional perspective.And it makes the exception analysis to the accident ship based on AIS ship track data.