| The rapid increase of flight increases the airport apron's utilization rate,making the operating process near the apron becomes more and more complex,which easily leads to flight delay,it is necessary to carry out the conflict control of the apron areas to reduce the apron taxiing zone conflicts.This paper mainly studies the conflict control in the apron areas and makes a theoretical discussion on the establishment of the apron traffic system.This paper uses color Petri net theory to analyze and to build model on airport apron operating processes.First,through discretizing runway,taxiway and parking apron,it builds basic Petri net model of apron operating processes;then,with consideration of feature of aircrafts operating in the busy airport apron,builds each apron traffic module elaborately.And this paper puts forward refine replace algorithm for basic net model,building global color Petri net model for apron operating model.Finally,it validates the effectiveness of building model method with examples.The method is portable,which can build busy airports apron operating model quickly.Based on the color Petri net theory,this paper analyzes the apron area and then analyzes the taxiing rules of the apron areas and its nearby areas.It researches in the internal operating characteristics of the apron,makes basis of the operating of the rule base,then according to the actual situation and the characteristics of the models to expand the rule base.Uses the corresponding model language to describe its rules,and uses CPNTools software for simulation finally.Taking some apron areas of the airport as an example,the apron traffic system is stratified.The effectiveness of the model is verified by using the constraint controller which embodies the rules of the apron control.The model can be used in the conflict control on the apron,which will help to reduce the workload of the apron controllers.At the same time,the research can also be used as a base for the future optimization of apron control. |
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