Requirement Modeling Method And Applied Research For AFC System Of Rail Transit

The research and development of city rail transit automatic fare collection system (AFC) in our country started late. But with the development of China's accelerated urbanization process, the construction of rail transportation and its informatization are in a state of rapid development. Analyzed and compared the methods and tools of requirements modeling, combined the application demand, operation flow and management methods of the AFC system, followed the object-oriented design method, a model suite to functional requirements of AFC system on city rail transit has been researched and proposed, and applied in the functional requirements modeling for AFC station computer system, including the modeling of use case model, behavior model and object model.The author's research work and practice can be summarized as follows:1) Analyzed research findings from related papers, compared the scope, advantages and disadvantages of various modeling methods.2) Extracted the functional requirements from the demands of rail transit AFC system through comprehensive analysis.3) Aiming at the functional requirement of AFC system, using the matching method, selected an effective modeling method to model and form the technical framework.4) Partly designed and implemented the subsystem or module of station computer system of AFC system to verify the correctness and performance of the modeling method proposed in this paper.A method and its technique framework suit to model for function requirements of AFC system on city rail transit has been proposed and practiced in design of station computer system in this paper. The achievements studied have valuable reference and practicabilities for function requirements'extracting and purifying, and for modeling, research and development, and etc of use case model, behavioral model and object model for the system.