Research on Accident Process Modeling Based on Hybrid Dynamic System Theory

An analysis of the accident characteristics in a system is proposed to research its accident process mechanism.The analysis indicates that there are hybrid characteristics which contain both discrete and continuous dynamic behaviors during an accident process.In view of the deficiency of simulating these hybrid characteristics with the current accident model,this paper presents a modeling method for accident processes based on hybrid system theory.The hybrid automata model of an accident process is provided,and the modeling and simulation is developed in the environment of Simulink/Stateflow.The combination of the system continuous mechanism with discrete state operation and their influence on each other can be achieved in this model.Then the simulation can provide the establishment of emergency treatment.Finally an example is discussed.The model simulates a dynamic process which starts at hazard and ends in accident or safety through emergency treatment.This example proves the validity of the proposed method.