Research And Implementation Of Fully Automatic Operation Simulation System Based On 3D Scene

The rapid development of urban rail transit has placed an urgent need for the development of highly automated CBTC system.As the core of urban rail transit,CBTC has experienced the development process of manual,semi-automatic and fully automatic.FAO is the future development direction of urban rail transit.It has many advantages such as high security,high reliability,high efficiency,centralized management,and control autonomy,which has been adopted by more and more cities.This thesis takes FAO as the research object,compares the difference with the traditional CBTC according to the relevant IEC standards,analyzes the fully automatic operation scenario,and proposes the simulation research of the fully automatic operation simulation based on the laboratory subway three-dimensional platform.Firstly,according to the hierarchical control idea,the three-layer architecture of the system is designed,which consists of the on-site 3D scene subsystem,the on-board control subsystem and the vehicle dispatch center subsystem from bottom to top.In addition,the system function requirements are analyzed;the system communication interface is designed;the key theories and technical solutions required by the system are described in detail,including the tracking operation principle,ATP safety braking model and its algorithm,ATO operation strategy and its automatic control algorithm.Secondly,based on FLC,the vehicle control subsystem is designed and implemented,and the functions of ATP protection,ATO operation and TOD human-machine interface are completed.The ATP unit mainly provides train overspeed protection and speed supervision;the ATO unit mainly realizes automatic train operation under the action of the fuzzy controller;the TOD unit mainly provides man-machine interface display.ATO is carried out under the protection of ATP,and both use TOD as a common human-computer interaction interface.Then,based on the characteristics of FAO,the added vehicle dispatch subsystem of the control center is designed and implemented,and station information monitoring,power-on and wake-up monitoring,on-board TOD monitoring,vehicle remote control,etc.are completed;in addition,increase the performance evaluator to evaluate the ATO control effect.Finally,a comprehensive test of the system shows that the intended simulation goal is achieved.The system works well and realistically presents the automatic operation process of the subway.It can not only meet the teaching and training needs,but also can be combined with the principle of train control as a visual simulation test platform.