| In China, the construction of the high-speed railway is remarkable. With the construction of Passenger Dedicated Line (PDL), some comprehensive transportation hubs have already formed in some major cities such as the Beijing South Railway Station, the Shanghan South Railway Station and the Guangzhou South Railway Station. With regard to these stations, there are some characteristics such as the space structure is complex, the passenger flow is large, the passenger constitute is complex, and the evacuating space is limited. In the hubs, passengers how to use the facilities? Which facilities are bottleneck of evacuation? How to improve the bottlenecks? How to evaluate the service level, the security level, and the utilization rate of the hubs? The traditional methods of forecasting passenger flow and evaluating and analyzing the hubs are unapplicable yet. How to resolve the problems, will provide technology safeguard and theoretical support for evaluating the hubs. Based on the problems above, combined with the project of the National High-Tech R&D Program of China (Grant No.2009AA11Z207) the author is engaging in, the paper primarily research and design the traffic hub pedestrians’simulation system.Firstly, in this paper, a detailed overview of multi-Agent systems and traffic hub simulation at home and abroad is given, based on that, characteristics and structures of Agent together with the structure of multi-Agent system are introduced, and then, communication model, communication language between Agents and message structures are presented. For the convenience and accuracy of the global communication, a transportation hub knowledge sharing model which is based on the ontology and suitable for system is established.Secondly, According to the need of traffic hub pedestrians’ simulation, the author researched the service characteristics of the traffic hub facilities, and then, based on the field survey data, obtained the service time distribution of the facilities. It is significant to the reliability and the practicability of the simulation data that the produce rule of the traffic hub pedestrians is in line with the reality. Based on plenty of investigation data, the author establishes the model of the passenger flow produce rule—composite negative exponent distribution. Thirdly, the author researched on the movement model and the route choice model of the pedestrians in the traffic hub which can be applied to the micro-simulation system. The author firstly perfected and improved the movement model of pedestrians in the traffic hub. With regard to the problem of pedestrians overlapping, a practical and feasible overlapping elimination algorithm is given About the problem of serious imbalance of passenger flow when several exits available, the autor expanded the concept of exit attractive force, and then a probability model is introduced aimed at different attractive force. An experiment proved that the improvement effect is remarkable. With a view to the route choice of pedestrians in the traffic hub, firstly, a hierarchical method is used, and then, a route choice model is established in according to the utility optimal theory.And then, based on the agent theory, service time distribution of the traffic facilities, the passenger flow produce rule, the pedestrians’movement model, pedestrians’ route choice rule, Agents suitable for the simulation are constructed, and a Agents based simulation system is established. The universality and the portability are all excellent, especially after the import of the Agent theory, the customization of the traffic hub which will be simulated and the pedestrians moving in the hub can be achieved conveniently and quickly.Finally, take the Beijing South Station as an example, based on the previous functional agents, a simulation system is established and experiments are carried out for verification. The simulation data is meaningful to the Beijing South Station to manage the passengers and to prevent the crisis. |
PDF Full Text Request