Simulation And Research On The On-board Operation Control System Of City Tram

On-board operation control system is the kernel of city tram system.It plays a pivotal role in ensuring the secure and efficient operation. Its positioning module is required to realize accurate real-time positioning to ensure operation security. Operation control strategy of the speed protection module has a marked impact on energy consumption,stopping accuracy, passenger comfort and punctuality. The cost of traditional field testing can be greatly reduced by its simulation.So it is significant to develop on-board operation control simulation system.The main function modules of on-board operation control system are determined according to actual operation and the structure of the system. Therefore, the positioning module and operation control strategy are researched because they are especially important. Then the functional simulation of on-board operation control system is realized.Firstly, chaotic particle swarm optimization (CPSO) algorithm is built by applying tent chaotic mapping to particle swarm optimization (PSO) algorithm.In order to improve the positioning accuracy and then ensure the running security, the output of global positioning system with radio frequency identification (GPS/RFID) fused by kalman filter is optimized by a new combinational algorithm which is derived from CPSO algorithm and BP neural network.Secondly, the operation control strategy of the speed protection module is to be optimized. A model is established on the single particle kinematics equation to minimize energy consumption and maximize station accuracy, passenger comfort as well as punctuality. The model is solved by chaotic immune particle swarm optimization (CIPSO) algorithm and the result is compared with that of PSO algorithm to demonstrate the applicability of the mode and the advantages of the algorithm.Finally, the entire system is simulated with the field data from the test section of Haizhu island circular new tram. The emergency braking is simulated, which can ensure precise stopping. Temporary speed restriction is simulated as well.It ensures that tram speed does not exceed the speed limit at the beginning of the speed restriction section. The on-board operation control on the turnout section and the level crossing of the main line is simulated to send the turnout control command and the priority pass request. The simulation of the entire system can not only modulate the control process repeatedly without destruction, but also lay the foundation for the simulation of city tram system.